Today being all about love the most important description of it comes from 1 Corinthians 13. Nothing says it better.
13 If I speak in the tongues of men and of angels, but have not love, I am a noisy gong or a clanging cymbal. 2 And if I have prophetic powers, and understand all mysteries and all knowledge, and if I have all faith, so as to remove mountains, but have not love, I am nothing. 3 If I give away all I have, and if I deliver my body to be burned,[a] but have not love, I gain nothing.
4 Love is patient and kind; love is not jealous or boastful; 5 it is not arrogant or rude. Love does not insist on its own way; it is not irritable or resentful; 6 it does not rejoice at wrong, but rejoices in the right. 7 Love bears all things, believes all things, hopes all things, endures all things.
8 Love never ends; as for prophecies, they will pass away; as for tongues, they will cease; as for knowledge, it will pass away. 9 For our knowledge is imperfect and our prophecy is imperfect; 10 but when the perfect comes, the imperfect will pass away. 11 When I was a child, I spoke like a child, I thought like a child, I reasoned like a child; when I became a man, I gave up childish ways. 12 For now we see in a mirror dimly, but then face to face. Now I know in part; then I shall understand fully, even as I have been fully understood. 13 So faith, hope, love abide, these three; but the greatest of these is love.