Bhagavad Gita Chapter 04, Text 36

Bg 4.36

api ced asi papebhyah
sarvebhyah papa-krt-tamah
sarvam jnana-plavenaiva
vrjinam santarisyasi

Word for word: 
api — even; cet — if; asi — you are; papebhyah — of sinners; sarvebhyah — of all; papa-krt-tamah — the greatest sinner; sarvam — all such sinful reactions; jnana-plavena — by the boat of transcendental knowledge; eva — certainly; vrjinam — the ocean of miseries; santarisyasi — you will cross completely.

Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Even if you are considered to be the most sinful of all sinners, when you are situated in the boat of transcendental knowledge you will be able to cross over the ocean of miseries.

Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Proper understanding of one’s constitutional position in relationship to Krishna is so nice that it can at once lift one from the struggle for existence which goes on in the ocean of nescience. This material world is sometimes regarded as an ocean of nescience and sometimes as a blazing forest. In the ocean, however expert a swimmer one may be, the struggle for existence is very severe. If someone comes forward and lifts the struggling swimmer from the ocean, he is the greatest savior. Perfect knowledge, received from the Supreme Personality of Godhead, is the path of liberation. The boat of Krishna consciousness is very simple, but at the same time the most sublime.