The rules of courtly love, according to Andreus Capellanus:

1. Marriage is no real excuse for not loving
2. He who is not jealous cannot love
3. No one can be bound by a double love
4. It is well known that love is always increasing or decreasing
5. That which a lover takes against the will of his beloved has no relish
6. Boys do not love until they arrive at the age of maturity
7. When one lover dies, a widowhood of two years is required of the survivor
8. No one should be deprived of love without the very best of reasons
9. No one can love unless he is impelled by the persuasion of love
10. Love is always a stranger in the home of avarice
11. It is not proper to love any woman whom one would be ashamed to seek to marry
12. A true lover does not desire to embrace in love anyone except his beloved
13. When made public love rarely endures
14. The easy attainment of love makes it of little value; difficulty of attainment makes it prized
15. Every lover regularly turns pale in the presence of his beloved
16. When a lover suddenly catches sight of his beloved, his heart palpitates
17. A new love puts to flight an old one
18. Good character alone makes any man worthy of love
19. If love diminishes, it quickly fails and rarely revives
20. A man in love is always apprehensive
21. Real jealousy always increases the feeling of love
22. Jealousy, and therefore love, are increased when one suspects his beloved
23. He whom the thought of love vexes eats and sleeps very little
24. Every act of a lover ends in the thought of his beloved
25. A true lover considers nothing good except what he thinks will please his beloved
26. Love can deny nothing to love
27. A lover can never have enough of the solaces of his beloved
28. A slight presumption causes a lover to suspect his beloved
29. A man who is vexed by too much passion usually does not love
30. A true lover is constantly and without intermission possessed by the thought of his beloved
31. Nothing forbids one woman being loved by two men or one man by two women

Music thanks to Verbum Gloriae

https://www.youtube.com/channel/UCOY2Hj4AbsnEfaQDvxQvnAg

"Exultemus et laetemus" - Responsorial chant for Paschaltide.

"Ego sum Alpha et O" - Antiphon for Paschaltide.