Enthusiasm is the dynamics of your personality. Without it, whatever abilities you may possess lie dormant; and it is safe to say that nearly every man has more latent power than he ever learns to use. You may have knowledge, sound judgment, good reasoning faculties; but no one-not even yourself-will know it until you discover how to put your heart into thought and action.
Dale CarnegieIf only the people who worry about their liabilities would think about the riches they do possess, they would stop worrying.
Dale CarnegieBitter criticism caused the sensitive Thomas Hardy, one of the finest novelists ever to enrich English literature, to give up forever the writing of fiction. Criticism drove Thomas Chatterton, the English poet, to suicide. . . . Any fool can criticize, condemn and complain - and most fools do. But it takes character and self-control to be understanding and forgiving.
Dale Carnegie