Friends are an aid to the young, to guard them from error; to the elderly, to attend to their wants and to supplement their failing power of action; to those in the prime of life, to assist them to noble deeds.
As long as you are lucky, you will have many friends; if cloudy times appear, you will be alone. -Donec eris felix, multos numerabis amicos; tempora si fuerint nubila, solus eris
There are three friendships which are advantageous, and three which are injurious. Friendship with the upright; friendship with the sincere; and friendship with the man of much observation: these are advantageous. Friendship with the man of specious airs; friendship with the insinuatingly soft; and friendship with the glib-tongued: these are injurious.
If a friend of mine gave a feast, and did not invite me to it, I should not mind a bit. but if a friend of mine had a sorrow and refused to allow me to share it, I should feel it most bitterly. If he shut the doors of the house of mourning against me, I would move back again and again and beg to be admitted so that I might share in what I was entitled to share. If he thought me unworthy, unfit to weep with him, I should feel it as the most poignant humiliation.
He that wrongs a friend Wrongs himself more, and ever bears about A silent court of justice in his breast, Himself the judge and jury, and himself The prisoner at the bar ever condemned.