(Certainly not an atheist, but let me join the fun.)
XIII Chapter, Paul’s First Letter to the Corinthians:
If I speak with the tongues of men and of angels, but do not have love, I have become a noisy gong or a clanging cymbal. If I have the gift of prophecy, and know all mysteries and all knowledge; and if I have all faith, that can move mountains, but do not have love, I am nothing. And if I give all my possessions to feed the poor, and if I surrender my body to be burned, but do not have love, it profits me nothing.
Love is patient, love is kind and is not jealous; love does not brag and is not rude,
does not act unbecomingly; it is not self-seeking, it is not easily-angered, does not keep a record of wrongs, it does not delight in evil, but rejoices in the truth; it bears all things, believes all things, hopes all things, endures all things. Love never fails.
For if there are gifts of prophecy, they will be done away; if there are tongues, they will cease; if there is knowledge, it will be pass away. For now we know in part and we prophesy in part, but when the perfect comes, the partial will be done away.
When I was a child, I used to speak like a child, think like a child, reason like a child; when I became a man, I did away with childish things. For now we see in a mirror dimly, but then face to face; now I know in part, but then I will know fully just as I also have been fully known.
But now faith, hope, love, these three remain; but the greatest of these is love.
(from memory, I am a blast at cocktail parties, I’m telling you.)