This means that If someone does a noble act it automatically get pursued from one person to another continuously like an eternal wave that forms in water due to the dropping of an object into it.This phrase can reminded to beneficiary of any charity, gift or donation which will prompt him to sense his/her obligation to help somebody else at the right time in future.

Nice!

Really! I have just watched 1 clip, It make me moved to tears See here: www.youtube.com/watch?v=yRf6wAR-eEY

A ripple is a little wave. It means that if you help someone, it would create an other good action which create another good action in a circle which never ends.