An agent who is free from attachment and the I-sense, courageous, steadfast, unmoved by success or failure— this kind of agent is sattvic. A rajasic agent is impulsive, seeks to obtain results, is greedy, violent, impure, and buffeted by joy and sorrow. An agent is called tamasic when he is undisciplined, stupid, stubborn, mean, deceitful, lazy, and easily depressed.
