So long as you do no harm to another, change your opinion once in a while. Contradict yourself without being embarrassed. This is your right. It doesn't matter what others think -because that's what they will think, in any case.
A diamond cannot be polished without friction, nor a person perfected without trials. Someone is enjoying shade today because someone planted a tree a long time ago.
To look at long term trends in our economy, in our society, in the international sphere and using my best judgment, shape policies that will serve the American people, keep them safe, keep our economy growing, put people back to work.
When you have made a thorough and reasonably long effort, to understand a thing, and still feel puzzled by it, stop, you will only hurt yourself by going on.
As long as the mind is seeking to fill itself, it will always be empty. When the mind is no longer concerned with filling its own emptiness, then only does that emptiness cease to be.