Mark 12:33
and to love him with the whole heart, and with the whole understanding, and with the whole soul, and with the whole strength, and to love one's neighbor as himself, is more than all whole burnt-offerings and sacrifices.
John 16:24
Till this time you have asked for nothing in my name; ask, and you shall receive, that your joy may be full.
John 21:17
He said to him a third time: Simon, son of Jonah, do you love me? Peter was grieved because he said to him the third time, Do you love me? And he said to him: Lord, thou knowest all things, thou knowest that I love thee. Jesus said to him: Feed my sheep.
1 John 4:19
We love him, because he first loved us.
1 John 5:2-3
By this we know that we love the children of God, when we love God, and keep his commandments.