Bhagavad Gita Chapter 18.16
tatraivaḿ sati kartāram
ātmānaḿ kevalaḿ tu yaḥ
paśyaty akṛta-buddhitvān
na sa paśyati durmatiḥ
Translation
Therefore one who thinks himself the only doer, not considering the five factors, is certainly not very intelligent and cannot see things as they are.