Vyasa said The mind creates innumerable ideas. The Understanding, differentiates things and ascertains their true nature. The heart discriminates which is pleasant and which unpleasant. There are the three forces which produce acts.
व्यास उवाच मनो विसृजते भावं बुद्धिरध्यवसायिनी। हृदयं प्रियाप्रिये वेद त्रिविधा कर्मचोदना॥