A man, who realises the potential of his mind by means of introspection and contemplation, does not lack self-confidence. He has control over his mind and he is able to realise its full potential.
Those who read books cannot understand the teachings and, what’s more, may even go astray. But those who try to observe the things going on in the mind, and always take that which is true in their own minds as their standard; never get muddled.
Win over the ill-natured man by goodness…Make haste in doing good; check your mind from evil; for the mind of him who is slow in doing meritorious actions delights in evil.
Undisturbed calmness of mind is attained by cultivating friendliness towards the happy, compassion for the unhappy, delight in the virtuous and indifference towards the wicked.

