That's hard. I have too many quotes I love to remember. But there's one verse, from the Bible, that ignites a spark of excitement in my heart that turns into a whole flame of love whenever I hear someone else say it, or when I chance upon it somewhere. Like my daily devotions book, like when Pastor Phil loosely quoted it.
(Ignite! I wanted to submit another post to Non Sequitur; only remembered about it when it got published.)
2 Timothy 1:7
For God did not give us a spirit of timidity,
but a spirit of power, of love and of self-discipline.