I have four kinds of days:
1) A day when I go out and meet someone more knowledgeable than me, so I learn from him and that is the day of my benefit and profit.
2) A day when I go out and meet someone less knowledgeable than me, so I teach him, and that is the day of my reward.
3) A day when I go out and meet someone like me and I study and review with him, and that is the day of my lesson.
4) A day when I go out and meet someone below my level but he sees himself as being above my level, so I don’t talk to him, and I make that the day for my rest.
Ibraheem An-Nakha’ee
[Jaami’u Bayaan Al-Ilm, no. 878]