SB 6.17.19
naivatma na paras capi
karta syat sukha-duhkhayoh
kartaram manyate ’trajña
atmanam param eva ca
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In this material world, neither the living entity himself nor others [friends and enemies] are the cause of material happiness and distress. But because of gross ignorance, the living entity thinks that he and others are the cause.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In this verse the word ajña is very significant. In the material world, all living entities are ajña, ignorant, in different degrees. This ignorance continues very strongly in the mode of ignorance presented by material nature. One must therefore promote himself to the stage of goodness through his character and behavior and then gradually come to the transcendental platform, or adhoksaja platform, in which he realizes both his position and the position of others. Everything is done under the superintendence of the Supreme Personality of Godhead. The process by which the results of action are ordained is called niyatam, always working.