BG 2.14

O son of Kunti, the contact between the senses and the sense objects gives rise to fleeting perceptions of happiness and distress. These are non-permanent, and come and go like the winter and summer seasons. O descendent of Bharat, one must learn to tolerate them without being disturbed.

BG 2.15

O Arjun, noblest amongst men, that person who is not affected by happiness and distress, and remains steady in both, becomes eligible for liberation.

BG 5.22

The pleasures that arise from contact with the sense objects, though appearing as enjoyable to worldly-minded people, are verily a source of misery. O son of Kunti, such pleasures have a beginning and an end, so the wise do not delight in them.

BG 12.13-14

Those devotees are very dear to Me who are free from malice toward all living beings, who are friendly, and compassionate. They are free from attachment to possessions and egotism, equipoised in happiness and distress, and ever-forgiving. They are ever-content, steadily united with Me in devotion, self-controlled, of firm resolve, and dedicated to Me in mind and intellect.

BG 13.8-12

Humbleness; freedom from hypocrisy; non-violence; forgiveness; simplicity; service of the Guru; cleanliness of body and mind; steadfastness; and self-control; dispassion toward the objects of the senses; absence of egotism; keeping in mind the evils of birth, disease, old age, and death; non-attachment; absence of clinging to spouse, children, home, and so on; even-mindedness amidst desired and undesired events in life; constant and exclusive devotion toward Me; an inclination for solitary places and an aversion for mundane society; constancy in spiritual knowledge; and philosophical pursuit of the Absolute Truth—all these I declare to be knowledge, and what is contrary to it, I call ignorance.

BG 14.24-25

Those who are alike in happiness and distress; who are established in the self; who look upon a clod, a stone, and a piece of gold as of equal value; who remain the same amidst pleasant and unpleasant events; who are intelligent; who accept both blame and praise with equanimity; who remain the same in honor and dishonor; who treat both friend and foe alike; and who have abandoned all enterprises – they are said to have risen above the three guṇas.

BG 17.9

Foods that are too bitter, too sour, salty, very hot, pungent, dry, and full of chillies, are dear to persons in the mode of passion. Such foods produce pain, grief, and disease.