“If you’re not failing every now and again, it’s a sign you’re not doing anything very innovative.”

“If you don’t like something, change it. If you can’t change it, change your attitude. Don’t complain.”

“Life is not difficult. Our thoughts about life are difficult.”

“Successful men become successful only because they acquire the habit of thinking in terms of success.”

How to find happines:
"Those who are not looking for happiness are the most likely to find it, because those who are searching forget that the surest way to be happy is to seek happiness for others”

“This principle [The Reality Principle] states that, ‘You must deal with life as it is, not as you wish it were, or could be.’”