How to attain peace?

apuryamanam acala-pratistham / samudram apah pravisanti yadvat
tadvat kama yam pravisanti sarve / sa santim apnoti na kama-kami (Bg 2.70)
A person who is not disturbed by the incessant 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. (Bg 2.70)

vihaya kaman yah sarvan / pumams carati nihsprhah
nirmamo nirahankarah / sa santim adhigacchati (Bg 2.71)
A person who has given up all desires for sense gratification, who lives free from desires, who has given up all sense of proprietorship and is devoid of false ego—he alone can attain real peace. (Bg 2.71)