To have a better life we must keep choosing how we are living.
If God has created the world, his primary worry was certainly not to make its understanding easy for us
Whether or not you can observe a thing depends upon the theory you use. It is the theory which decides what can be observed.
If you want to live a happy life, tie it to a goal, not to people or objects.
You cannot beat a roulette table unless you steal money from it.
Necessity is the mother of all invention.