Whoever then relaxes one of the least of these commandments and teaches men so, shall be called least in the kingdom of heaven; but he who does them and teaches them shall be called great in the kingdom of heaven.

Matthew 5:19

No matter how just your words may be, when you speak with anger, you ruin all: no matter how boldly you speak, how fairly reprove, or what not.

- St. John Chrysostom