The luminosity of light and flames show that Sattwa is present in them as well. The presence of Sattwa causes our minds to be alert, aware, peaceful, compassionate, serene, nonviolent, forgiving and capable of knowing the unknown. Whenever we come to know anything, the revelation of that knowledge is because of the presence of Sattwa in our mind. Rajas causes movement, activity and stimulation. Wherever there is any activity or movement, Rajas is present.
Rajas also generates pain and suffering.
Anger, avarice, self-conceit, arrogance, boastfulness, the tendency to dominate over others, etc. indicate the presence of Rajas in our minds. The properties of Tamas are the very opposite of those of Sattwa and Rajas. While Sattwa causes lightness and the ability to acquire knowledge, Tamas causes heaviness and obstructs knowledge by ignorance. While Sattwa contributes to mental peace, happiness and serenity, Tamas induces dullness, sadness and confusion. Sattwa endows light with the power to dispel darkness.