Definition: wholly committed to a cause, ideal, or personal goal; zealous

• The first fresh hour of every morning should be dedicated to the Lord, whose mercy gladdens it with golden light. — Charles Haddon Spurgeon (1834–1892) English Baptist preacher
• The secret of happiness is: Find something more important than you are and dedicate your life to it. — Daniel Clement Dennett III (1942-) American philosopher & cognitive scientist

Affirmation: An affirmation is a confident statement somewhat like an oath. You are dedicating your will to the doing of some deed, or the keeping of some promise. In order to do so, you need to hold a firm conviction that you will be able to be true to your pledge — for an appreciable amount of time.

Consideration: When deciding on what to dedicate real effort to, look beyond the cause célèbre.