A few quotes by the Buddha

"What we think, we become.
All that we are arises with our thoughts.
With our thoughts, we make the world."

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense."

"All that we are is the result of what we have thought.
If a man speaks or acts with an evil thought, pain follows him.
If a man speaks or acts with a pure thought, happiness follows him,
like a shadow that never leaves him."