Genuine human friendship is on the basis of human affection, irrespective of your position. Therefore, the more you show concern about the welfare and rights of others, the more you are a genuine friend. The more you remain open and sincere, then ultimately more benefits will come to you. If you forget or do not bother about others, then eventually you will lose your own benefit.
It is not merely true that a creed unites men. Nay, a difference of creed unites men - so long as it is a clear difference. A boundary unites. Many a magnanimous Moslem and chivalrous Crusader must have been nearer to each other, because they were both dogmatists, than any two agnostics. "I say God is One," and "I say God is One but also Three," that is the beginning of a good quarrelsome, manly friendship.
To give and receive advice - the former with freedom, and yet without bitterness, the latter with patience and without irritation - is peculiarly appropriate to geniune friendship.
Those friends thou hast, and their adoption tried, Grapple them to thy soul with hoops of steel; But do not dull thy palm with entertainment Of each new-hatch'd, unfledg'd comrade.
I don't think life offers any greater experience than the joyful sense of recognition when one finds in a new acquaintance a real friend, or when an old relationship deepens into friendship, or when one finds an old friendship intact despite the passage of years and many absences.