The man who backbites an absent friend, nay, who does not stand up for him when another blames him, the man who angles for bursts of laughter and for the repute of a wit, who can invent what he never saw, who cannot keep a secret -- that man is black at heart: mark and avoid him.
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.
Friendship exists outside our modern economy of scarcity... It's not about apportioning vanishing resources of time and energy. Friendship is a blessed relic of the ancient economy of the gift, and the time freely given to people dear to you actually creates magical abundance.