Corinthians 13

(I use this one a lot)

Love is patient and kind;
love is not jealous or boastful;
it is not arrogant or rude.
Love does not insist on its own way;
it is not irritable or resentful;
it does not rejoice at wrong,
but rejoices in the right.
Love bears all things,
believes all things,
hopes all things,
endures all things.
Love never ends.