Passion

PASSION-The state of the mind when it is powerfully acted upon and influenced by something external to itself; the state of any particular faculty which, under such conditions, becomes extremely sensitive or uncontrollably excited; any emotion or sentiment (specifically, love or anger) in a state of abnormal or controlling activity; an extreme or inordinate desire; also, the capacity or susceptibility of being so affected; as, to be in a passion; the passions of love, hate, jealously, wrath, ambition, avarice, fear, etc.; a passion for war, or for drink; an orator should have passion as well as rhetorical skill.

http://www.brainyquote.com/words/pa/passion199957.html

Passion is something that once you have it it will never leave you... not completely. You may at times get discouraged but it will eventually come back to you. I have a passion for singing. It is my life and my way of expression. Without music and voice i would not be the person that i am today.