Facing the Abyss
Arjuna's collapse into grief and moral paralysis at the end of chapter 1, and the equanimity teaching chapter 2 builds specifically to answer it.
BG 1.28
Deeply moved to pity, thus uttered in sadness: Arjuna said: Seeing these my kinsmen, O Krishna, arrayed, eager to fight,
BG 1.30
Gândîva slips from my hand, and my skin burns all over, I am not able to stand, my mind is whirling,
BG 1.47
Sanjaya said: Having thus spoken on the battle-field, Arjuna sank down on the seat of the chariot, casting away his bow and arrow, his mind overborne by grief.
BG 2.14
The contacts of matter, O son of Kuntî, giving cold and heat, pleasure and pain, they come and go, impermanent; endure them bravely, O Bhârata.
BG 2.56
He whose mind is free from anxiety amid pains, indifferent amid pleasures, loosed from passion, fear and anger, is called a sage of stable mind.