Christian quotes can give a glimpse into the minds of some of the most influential Christians of all time. I've tried to compile some of my personal favorites.
The whole of creation, with all of its laws, is a revelation of God. -- Dean William Ralph Inge
One on God's side is a majority. -- Wendell Phillips
All I have seen teaches me to trust the Creator for all I have not seen. -- Ralph Waldo Emerson
God helps the brave. -- Johann Christoph Freidrich von Schiller
Strike from mankind the principle of faith and men would have no more history than sheep.-- Mark Beltare
For with God nothing shall be impossible. -- Luke 1:37
For a small reward, a man will hurry away on a long journey; while for eternal life, many will hardly take a single step. - Thomas a' Kempis (1380-1471)
"We are told that Christ was killed for us, that His death has washed out our sins, and that by dying He disabled death itself. ... That is Christianity. That is what has to be believed." - C.S. Lewis, Mere Christianity
Many promising reconciliations have broken down because, while both parties came prepared to forgive, neither party came prepared to be forgiven. - Charles Williams
He became what we are that He might make us what He is. - Saint Athanasius, 295-373
While the quotes above can get you started, there is another great resource I've found for
Inspirational Christian and Bible Quotes.
If you want to find some more great quotes on this subject, be sure to check it out.