What brings a tear of joy to your eye?
I have a sensitive heart, so there are quite a few things on my list. Seeing a newborn baby, seeing or knowing an abused animal is adopted, seeing someone get their life to Christ. Are the main ones. Other are seeing acts of kindness and knowing it blessed the other person immensely, when something happens in my life that is impossible and then realizing God has done it.
From Pity to Praise 