You can do anything, but not everything.
You must be the change you wish to see in the world.
Before I got married I had six theories about bringing up children; now I have six children and no theories.
The person who reads too much and uses his brain too little will fall into lazy habits of thinking.
Look at the sky. We are not alone. The whole universe is friendly to us and conspires only to give the best to those who dream and work.