samudram apah pravisanti yadvat
tadvat kama yam pravisanti sarve
sa santim apnoti na kama-kami
(Text 70, Contents of the Gita Summarized)
Meaning: A person who is not disturbed flow of desires–that enter like rivers into the ocean, which is ever being filled but is always still–can alone achieve peace, and not the man who strives to satisfy such desires.