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.

" The Vedanta recognises no sin, it only recognises 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 "
- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 2/Practical Vedanta and other lectures/Practical Vedanta: Part I (Delivered in London, 10th November 1896)