Motivational Teachings from Swami Vivekananda

The Vedanta recognizes no sin, it only recognizes error. And the greatest error, says the Vedanta, is to say that you are weak, that you are a sinner, a miserable creature, and that you have no power and you cannot do this and that.
Every time you think in that way, you, as it were, rivet one more link in the chain that binds you down; you add one more layer of hypnotism on to your own soul. Therefore, whosoever thinks he is weak is wrong, whosoever thinks he is impure is wrong, and is throwing a bad thought into the world.
This we must always bear in mind that in the Vedanta there is no attempt at reconciling the present life with the ideal; but this false life must go, and the real life which always exists must manifest itself, must shine out.
No man becomes purer and purer; it is a matter of greater manifestation. The veil drops away, and the native purity of the soul begins to manifest itself. Everything is ours already – infinite purity, freedom, love, and power.
Swami Vivekananda
(Source Complete Works, 2: 295-296)