“When once you have plunged into the strife for power, it is the fear of those who are seeking for power over you that so easily persuades to all the great crimes.”

Source: Freedom from Fear (1991)
Context: It is not power that corrupts but fear. Fear of losing power corrupts those who wield it and fear of the scourge of power corrupts those who are subject to it. Most Burmese are familiar with the four a-gati, the four kinds of corruption. Chanda-gati, corruption induced by desire, is deviation from the right path in pursuit of bribes or for the sake of those one loves. Dosa-gati is taking the wrong path to spite those against whom one bears ill will, and moga-gati is aberration due to ignorance. But perhaps the worst of the four is bhaya-gati, for not only does bhaya, fear, stifle and slowly destroy all sense of right and wrong, it so often lies at the root of the other three kinds of corruption. Just as chanda-gati, when not the result of sheer avarice, can be caused by fear of want or fear of losing the goodwill of those one loves, so fear of being surpassed, humiliated or injured in some way can provide the impetus for ill will. And it would be difficult to dispel ignorance unless there is freedom to pursue the truth unfettered by fear. With so close a relationship between fear and corruption it is little wonder that in any society where fear is rife corruption in all forms becomes deeply entrenched.

An Old Man's Thoughts on Many Things, Of Education I

Source: The Summer Garden

Stephen Colbert - It Gets Better (13 July 2011) http://www.youtube.com/watch?v=BThRZbCs-p8
Context: If you don't give power to the words that people throw at you to hurt you, they don't hurt you anymore — and you actually have power over those people. … So, if you can, realize that the things that people say about you — they don't really matter — it's who you are. And the older you get, the more you'll understand that — because it gets better. And people get nicer too.

Source: Sappho's Leap

" The Leakers Who Exposed Gen. Flynn’s Lie Committed Serious — and Wholly Justified — Felonies https://theintercept.com/2017/02/14/the-leakers-who-exposed-gen-flynns-lie-committed-serious-and-wholly-justified-felonies/," The Intecept, 14 February 2017.

Source: The Name of the Star

Variant: Your past is just a story. And once you realise this, it has no power over you.
Source: Invisible Monsters

Acceptance Speech http://www.washingtonpost.com/wp-srv/politics/daily/may98/goldwaterspeech.htm as the Republican Presidential candidate, San Francisco (July 1964)
Unsourced variant: Now those who seek absolute power, even though they seek it to do what they regard as good, are simply demanding the right to enforce their own version of heaven on earth, and let me remind you they are the very ones who always create the most hellish tyranny.
Context: Those who seek absolute power, even though they seek it to do what they regard as good, are simply demanding the right to enforce their own version of heaven on earth. And let me remind you, they are the very ones who always create the most hellish tyrannies. Absolute power does corrupt, and those who seek it must be suspect and must be opposed. Their mistaken course stems from false notions of equality, ladies and gentlemen. Equality, rightly understood, as our founding fathers understood it, leads to liberty and to the emancipation of creative differences. Wrongly understood, as it has been so tragically in our time, it leads first to conformity and then to despotism.