What you get by achieving your goals is not as important as what you become by achieving your goals.
Henry David Thoreau-
Challenges are what make life interesting and overcoming them is what makes life meaningful.
Joshua J. Marine-
First, have a definite, clear practical ideal; a goal, an objective. Second, have the necessary means to achieve your ends; wisdom, money, materials and methods. Third, adjust all your means to that end.
Aristotle-
Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.
Albert Einstein-