Here is a poem I remember form high school. A little dated but still good.
GOD IS LIKE...
GOD is like Coke...He's the real thing.
GOD is like Pan Am...He makes the going great.
GOD is like General Electric...He lights your path.
GOD is like Bayer Aspirin...He works wonders.
GOD is like Hallmark Cards...He cares enough to send the very best.
GOD is like Tide...He gets the stains out that others leave behind.
GOD is like VO5 Hair Spray...He holds through all kinds of weather.
GOD is like Dial Soap...Aren't you glad you know him? Don't you wish everyone did?
GOD is like Sears...He has everything.
GOD is like Alka Seltzer...Try Him. You'll like Him.
GOD is like Scotch Tape... You can't see him, but you know he's there.