“Knowledge is power. Power to do evil...or power to do good. Power itself is not evil. So knowledge itself is not evil.”
― Veronica Roth, Allegiant

“I cannot teach anybody anything. I can only make them think”
― Socrates

“The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.”
― Stephen Hawking

“The man of knowledge must be able not only to love his enemies but also to hate his friends.”
― Friedrich Nietzsche

“I did then what I knew how to do. Now that I know better, I do better.” 

“Hold fast to dreams,
For if dreams die
Life is a broken-winged bird,
That cannot fly.” 

A friend is someone who knows all about you and still loves you.