Bhagwad Gita
Chapter 18, Verse 16
तत्रैवं सति कर्तारमात्मानं केवलं तु यः।पश्यत्यकृतबुद्धित्वान्न स पश्यति दुर्मतिः।।18.16।।
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.