If you want to live a happy life, tie it to a goal, not to people or objects.
What you get by achieving your goals is not as important as what you become by achieving your goals.
HENRY DAVID THOREAU
You must be the change you wish to see in the world.
Never give up on a dream just because of the time it will take to accomplish it. The time will pass anyway.
Anyone who has ever made anything of importance was disciplined.