Did you ever see an unhappy horse? Did you ever see bird that had the blues? One reason why birds and horses are not unhappy is because they are not trying to impress other birds and horses.
Dale CarnegieThe resentment that criticism engenders can demoralize employees, family members and friends, and still not correct the situation that has been condemned.
Dale CarnegieOne of the worst features about worrying is that it destroys our ability to concentrate. When we worry, our minds jump here and there and everywhere, and we lose all power of decision. However, when we force ourselves to face the worst and accept it mentally, we then eliminate all those vague imaginings and put ourselves in a position in which we are able to concentrate on our problem.
Dale Carnegie