Because He First Loved Us. 1John 4:16-19

And so we know and rely on the love God has for us.
God is love. Whoever lives in love lives in God, and God in them. 
This is how love is made complete among us so that we will have confidence on the day of judgment: 
In this world we are like Jesus. 
There is no fear in love. But perfect love drives out fear, because fear has to do with punishment.
The one who fears is not made perfect in love.
We love because he first loved us.
1 John 4:16-19