The Sri Caitanya Upanisad, excerpted by Srila Bhaktivinoda Thakura from the Atharva Veda

Lord Brahma replied: "Listen carefully, for I shall give you a confidential description of what will happen in the Kaliyuga. The Supreme Personality of Godhead, Govinda, the supreme enjoyer, whose form is transcendental, who is beyond the touch of the three modes of material nature, and who is the all-pervading Supersoul residing in the hearts of all living entities, will appear again in the Kali age. Appearing as the greatest devotee, the Supreme Personality of Godhead will assume a two-armed form of golden complexion in His abode of Goloka Vrndavana manifesred on the bank of the Ganges at Navadvipa. He will disseminate pure devotional service in the world. This incarnation of the Lord is described in the following verses."
 
Text 1
atha pippaladah samit-panir bhagavantam brahmanam
upasanno bhagavan me fubham kim atra caksasveti.
 
Carrying firewood in his hands, Pippalada humbly approached his father, Lord Brahma, and asked: "0 my Lord,please tell me how I may attain an  auspicious life."
 
Text 2
sa hovaca, bhuya eva tapasa brahmacaryena sasvad ramasva mano vaseti.
 
Lord Brahma replied: "Be satisfied by remaining always celibate, and perform austerities. Carefully control the activities of the mind. In this way you will attain an auspicious condition of life."
 
Text 3
sa tatha bhutva bhaya enam upasadyaha bhagavan kalau papac channah prajah katham mucyerann iti
 
Pippalada followed these instructions, and after having become pure in his own heart and mind, he again approached his father and asked: "0 my Lord, please tell me how the sinful living enriries in the Kali yuga may be delivered."
 
Text 4
ko va devata ko va mantro bhuhiti.
 
"Who should be the object of their worship, and what mantra should they chant in order to become delivered? Kindly inform me."
 
Text 5
sa hovaca. rahasyam te vadisyami jahnavi tire navadvipe golo kakhye dhamni govindo dvi-bhujo gaurah sarvatma mahapuruso mahatma maha-yogi tri-gunatitah sattva-rupo bhaktim loke kasyatiti. tad ete sloka bhavanti.
 
 
Lord Brahma replied: "Listen carefully, for I shall give you a confidenrial description of what will happen in the Kaliyuga. The Supreme Personality of Godhead, Govinda, the supreme enjoyer, whose form is transcendental, who is beyond the touch of the three modes of material nature, and who is the all-pervading Supersoul residing in the hearts of all living entities, will appear again in the kali age. Appearing as the greatest devotee, the Supreme Personality of Godhead will assume a two-armed form of golden complexion in His abode of Goloka Vrndavana manifesred on the bank of the Ganges at Navadvipa. He will disseminate pure devotional service in the world. This incarnation of the Lord is described in the following verses."
 
Text 6
eko devah sarva-rupi mahatma
gauro rakta-syamala-sveta-rupah
caitanyatma sa vai caitanya- saktir
bhaktakaro bhakti-do bhakti-vedyah
 
The one Supreme Personality of Godhead, who is the master of all transcendental potencies, and who may be known only by devotional service, appears in innumerable tanscendental forms. He has appeared with red, black, and white complexions, and He shall also appear in the golden form of SrI Caitanya Mahaprabhu. He shall assume the role of the perfect devotee, and He shall teach the conditioned souls the path of pure devotional service.
 
Text 7
nama vedanta vedyaya
krsnaya paramatmane
sarva-caitanya-rupaya
caitanyaya nama namah
 
I offer my respectful obeisances unto Lord SrI Krsna, the all pervading Personality of Godhead, who is understood by the study of Vedanta philosophy. He is the master of all transcendental potencies, and He appears as Sri Caitanya Mahaprabhu.
 
Text 8
vedanta-vedyam purusam puranam
caitanyatmanam visva-yonim mahantam
tam eva viditvati-mrtyum eti
nanyah pancha vidyate 'yanaya
 
One who understands that Sri Caitanya Mahaprabhu is the Supreme Personality of Godhead, who is known by the study of Vedanta philosophy, who is the original cause of the universe, and who is the oldest, the original person, crosses beyond this world of birth and death. This is the proper understanding of the Supreme Personality of Godhead, and aside from this there is no other way for one to achieve liberation.
 
Text 9
sva-nama-mula-mantrena sarvam hladayati vibhuh
 
Appearing in this golden form, the all-powerful Supreme Lord will fill the entire universe with transcendental bliss by the chanting of His own holy names.
 
Text 10
dve sakti parame tasya hladini samvid eva ca iti.
 
In this way the Supreme Lord manifests two of His transcendenral potencies: His hladini sakti (the potency of transcendenral bliss) and samvit Sakti (the potency of transcendental knowledge).
 
Text 11
sa eva mula-mantram japati harir iei Krsna iti rama it.
 
The Supreme Lord will chant a mantra consisting of the names ofHari, Krsna , and Rama (the maha-mantra: Hare Krsna, Hare Krsna, Krsna Krsna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare).
 
Text 12
harati hrdaya-granthim vasana-rupam iti harih-knih-smaranme
tac ca nas tad-ubhaya-melanam iti knrsnah-ramayati sarvam iti
rama ananda-rupah atra sLoko bhavati.
 
 
These three names of the Supreme Lord (Hari, Krsna, and Rama) may be explained in the following way: (1) "Hari" means ('He who unties [harati] the knot of material desire in the hearts of the living entities"; (2) j(Krsna" is divided into the two syllables j(Krs" and "na," «Krs" means "He who attracts the minds of all living entities," and "na" means "the supreme transcendental pleasure." These two syllables combine to become the name "krsna"; and (3) "Rama" means "He who delights [ramayati] all living entities," and it also means "He who is full of transcendental bliss." The maha-mantra consists of the repetition of these names of the Supreme Lord. 
 
Text 13 
mantro guhyah paramo bhakti-vedyah.
 
The maha-mantra (Hare Krsna, Hare Krsna, Krsna Krsna, Hare Hare/Hare Rama, Hare Rama, Rama Rama, Hare Hare) is the best of all mantras. Although it is very difficult to understand the maha-mantra, it may be understood when one engages in pure devotional service of the Supreme Lord. 
 
Text 14 
namany astav asta ca sobhanani, tani nityam ye japanti dhiras te
vai mayam atitaranti nanyah paramam mantram paramarahasyam
nit yam avartayati.
 
 
Those who seriously desire to make progress in spiritual life continually chant these sixteen splendid names of the Supreme Personality of Godhead, and in this way they cross beyond the bondage of continued material existence. The chanting of these holy names of the Lord is the greatest of all mantras, and it is the most confidential of all secrets. 
 
Text 15
caitanya eva sarikarsano vasudevah paramesthi rudrah sakro 
brhaspatih sarve devah sarvani bhutani sthavarani carani ca yat kincit sad-asat-karanam sarvam tad atra slolokah 
 
 
Lord Caitanya Mahaprabhu is the Supreme Personality of Godhead who appears as Lord Sankarsana and Lord Vasudeva. He is the original father of Brahma, Siva, Indra, Brhaspati, all the demigods, and all moving and nonmoving living entities. He is the original cause of all that is temporary and all that is eternal. Nothing exists separately from Him, and therefore He is everything. He is described in the following verses.
 
Text 16 & 17
yat kincid asad bhunkte
ksaram tat karyam ucyate
sat karanam param jivas
tad aksaram itiritam
ksaraksarabhyam, paramah
sa eva Purusoottamah
caitanyakhyam param tatwam
sarva-krsna-Karanam
 
This material world is temporary, whereas the individual living entities who try to enjoy matter are eternal and superior to it. The Supreme Personality of Godhead is superior to both the temporary material energy and the eternal living entities. Lord Caitanya Mahaprabhu is this Supreme Person, the Absolute Truth, the original cause of all causes.
 
Text 19
ya enam rasayati bhajati dhyayati sa papmanam tarati sa pitto
bhavati, sa tatvarm janati, sa tarati sokam, gatis tasyate
nanyasyeti.
 
 
One who worships the Supreme Lord, Sri Caitanya Mahaprabhu, with devotion and always remembers Him becomes free from all sins and completely pure. Easily understanding the truth about the Personality of Godhead and becoming free from all material lamentation,  such a devotee attains the supreme goal of life, which is unattainable by those averse to the Supreme Lord, Sri Caitanya Mahaprabhu.
 
 
Srila Bhaktivinoda Thakura, a great acarya, or spiritual teacher, was the father of Srila Bhaktisiddhanta Sarasvati Thakura, the spiritual master of His Divine Grace A.C. Bhaktivedanra Swami Prabhupada. Kusakratha Dasa, a disciple of Srila Prabhupada, has translated more than 120 sacred books from Sanskrit and Bengali into English.