Up to now only "The Love from Jesus"!
This is the only thing I can sure.I love my husband but I also can not said it won't change forever but I quess my love to my girl may be my 2nd answer! Hope we all can find somemore!
Apart from the love of God, it must be the love of parents. The love of parents will never change and never ask for reward. The joy of parents would be seeing their children growing up healthy and happily.