Lord Caitanya teaches the science of Krishna Consciousness. That science is absolute. Dry mental speculators try to restrain themselves from material attachment, but it is generally found that the mind is too strong to be controlled and that it drags them down to sensual activities. A person in Krishna consciousness does not run this risk. One has to engage his mind and senses in Krishna Conscious activities, and Lord Caitanya teaches one how to do this in practice.

His Divine Grace A.C. Bhaktivedanta Swami Prabhupāda appeared in this world in 1896 in Calcutta, India. He first met his spiritual master, Śrīla Bhaktisiddhānta Sarasvati Gosvāmi, in Calcutta in 1922. Bhaktisiddhānta Sarasvati, a prominent religious scholar and the founder of sixty-four Gaudīya Mathas (Vedic institutes) in India, liked this educated young man and convinced him to dedicate his life to teaching Vedic knowledge. Śrīla Prabhupāda became his student and, in 1933, his formally initiated disciple.

At their first meeting Śrīla Bhaktisiddhānta Sarasvati requested Śrīla Prabhupāda to broadcast Vedic knowledge in English. In the years that followed, Śrīla Prabhupāda wrote a commentary on the Bhagavad-gītā, assisted the Gaudīya Matha in its work, and, in 1944, started Back to Godhead, an English fortnightly magazine. Single-handedly, Śrīla Prabhupāda edited it, typed the manuscripts, checked the proofs, and even distributed the individual copies. The magazine is now being continued by his disciples.

There is no difference between the teachings of Lord Caitanya presented here and the teachings of Lord Krsna in the Bhagavad-gītā. The teachings of Lord Caitanya are practical demonstrations of Lord Krsna's teachings. Lord Krsna's ultimate instruction in Bhagavad- gītā is that everyone should surrender unto Him, Lord Krşņa. Krsna promises to take immediate charge of such a surrendered soul. The Lord, the Supreme Personality of Godhead, is already in charge of the maintenance of this creation by virtue of His plenary expansion, Kşīrodakaśāyī Vişņu, but this maintenance is not direct. However, when the Lord says that He takes charge of His pure devotee, He actually takes direct charge. A pure devotee is a soul who is forever surrendered to the Lord, just as a child is surrendered to his parents or an animal to its master. In the surrendering process, one should: (1) accept things favorable for discharging devotional service, (2) reject things unfavorable, (3) believe firmly in the Lord's protection, (4) feel exclusively dependent on the mercy of the Lord, (5) have no interest separate from the interest of the Lord, and (6) always feel oneself meek and humble.