Love

1 John 4:8 

8 He that loveth not knoweth not God; for God is love.

If you have no love in your heart then you know nothing of God. If you look at the sinner and hate them, then you need to pray. You must be at a point that you hate the sin they are in, but never hate the soul of the sinner. They are lost and undone just as you was at one point. Now if you set in a church and look at someone else proclaiming christ and you have no love for them, well you need to find God. Stop letting hate be in your vocabulary. Stop letting strife have a place in your heart. Learn to love like God did and he gave his son to die for your sins.