Charity never faileth. It does not envy, it does not boast, it is not proud. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres.
Love never fails.
This is true love, the kind that we can always expect, but not deserve, from our Lord Jesus Christ. Here's a beautifully made page on this holiday. Annie not only focuses on God's love, but also writes about the history of the the holiday.