And what is it that makes one man an exceptional leader? We see indications that it is his negative side which makes him strong, that his evil side, if you will, properly controlled and disciplined, is vital to his strength.
– Mr. Spock
Increased spiritual strength is a gift from God which He can give when we push in His service to our limits. Through the power of the Atonement of Jesus Christ, our natures can be changed. Then our power to carry burdens can be increased more than enough to compensate for the increased service we will be asked to give.
– Henry B. Eyring