"it may even be the least honored and glorified human quality" The sentence is talking about a human quality (virtue) صفة إنسانية That hasn't been honored and appreciated enough when I say that أحمد أقل حظا من الآخرين this means "Ahmed is less lucky than others (or the least)" so this human quality is the least human quality that got appreciated ever. I hope I was clear.

May be this human quality was the least one people payed attention to

but may have been less fortunate human qualities of honor and praise