SB 11.23.42
dvija uvaca
nayam jano me sukha-duhkha-hetur
na devatatma graha-karma-kalah
manah param karanam amananti
samsara-cakram parivartayed yat
Translation:
The brahmana said: These people are not the cause of my happiness and distress. Neither are the demigods, my own body, the planets, my past work, or time. Rather, it is the mind alone that causes happiness and distress and perpetuates the rotation of material life.