If you want a confidence, act as if you already have it. Try the "as if" technique.

The art of being wise is the art of knowing what to overlook.

The mind, in short, works on the data it receives very much as the sculptor works on his block of stone.

No matter how full a reservoir of maxims one may possess, and no matter how good one's sentiments may be, if one has not taken advantage of every concrete opportunity to act, one's character may remain entirely unaffected for the better.

Keep the faculty of effort alive in you by a little gratuitous exercise every day.

Psychology saves us from mistakes. It makes us more clear as to what we are about. We gain confidence in respect to any method which we are using as soon as we believe that it has theory as well as practice at its back.

To kill time is not murder, it's suicide.