Buddha.

All things appear and disappear because of the concurrence of causes and conditions. Nothing ever exists entirely alone; everything is in relation to everything else. 

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. 

He is able who thinks he is able.

What we think, we become 

We are what we think. All that we are arises with our thoughts. With our thoughts, we make the world.

All that we are is the result of what we have thought.

Be vigilant; guard your mind against negative thoughts.