Mind is a thing of many colours. Just as the water of the Ganges River is contaminated by being put in a vessel where liquor had been kept, so also a virtuous person is spoiled by bad company or constant association with evil persons. The three gunas or attributes colour the faith of a man. The mind of a man is governed by the preponderating attribute or quality which manifests when the other two qualities are suppressed. Faith takes a threefold aspect in accordance with the inherent nature or tendencies of the man.
Faith is the main support of life.
It is not a mere intellectual belief or blind acceptance of pet dogmas or doctrines. The faith of each is in accordance with his nature, O Arjuna. Man is imbued with faith. A man's character may be judged by his faith. A man's faith shows what his character is.