"Be my sons, the clear meaning and the living example of the saying of Hudba bin al-Khashram al-Udhri:
Be a home for the good and shun the mean,
For verily you will see and hear (of such)
So long as you live.
Love when you love moderately,
For you never know when you may change.
Hate when you hate moderately
For you never know when amity may return."
- Al-Wasiyya of Shaykh Abd al-Mahmud al-Hayfan
O son, this serves as a new lesson to me, although I have heard of it before and despite learning from experience that loving or hating excessively could be harmful in the end and that we should love and hate only for the sake of Allah.