"The merciful man doeth good to his own soul: but he that is cruel troubleth his own flesh." -Proverbs 11:17, KJV.

So many times we look at helping someone else as an inconvenience or an otherwise bad thing. However, the truth here is that when we are merciful to those around us, it actually helps us. Further we find out that when we hurt others, we hurt ourselves on the process. Show some mercy today. If they deserved it, it wouldn't be able to be called mercy.