Four great quotes from Randy Alcorn's recent Eternal Perspectives newsletter:

A godly man is a praying man. As soon as grace is poured in, prayer is poured out. Prayer is the soul's traffic with Heaven; God comes down to us by His Spirit, and we go up to Him by prayer.—T. Watson

Every great movement of God can be traced to a kneeling figure.—D.L. Moody

Pray for 'all men.' We usually pray more for things than we do for men. Our prayers should be thrown across their pathway as they rush in their downward course to a lost eternity.—E.M. Bounds
(This quote should be incluced in every "Christianity 101" class ever taught.)

Search for a person who claims to have found Christ apart from someone else's prayer, and your search may go on forever.—E. Bauman