How to be a friend to many people

"One must see in every human being only that which is worthy of praise. When this is done, one can be a friend to the whole human race. If, however, we look at people from the standpoint of their faults, then being a friend to them is a formidable task." (Abdu'l-Baha, Selections from the Writings of Abdu'l-Baha, p. 169)