Quote by Steve Jobs

Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work. And the only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle. As with all matters of the heart, you'll know when you find it. 
-Steve Jobs, (February 24, 1955 - October 5, 2011) was an American information technology entrepreneur and inventor. He was the co-founder, chairman, and chief executive officer of Apple Inc.