A loyal friend laughs at your jokes when they’re not so good, and sympathizes with your problems when they’re not so bad. – Arnold H. Glasgow

You can always tell a real friend: when you’ve made a fool of yourself he doesn’t feel you’ve done a permanent job. – Laurence J. Peter

The rule of friendship means there should be mutual sympathy between them, each supplying what the other lacks and trying to benefit the other, always using friendly and sincere words. – Marcus Tullius Cicero