Advice ... is a habit-forming drug. You give a dear friend a bit of advice today, and next week you find yourself advising two or three friends, and the week after, a dozen, and the week following, crowds!
Invitation is the sincerest flattery.
One of the first principles of perseverance is to know when to stop persevering.
A living gale is better than a dead calm.
Advice is one of those things it is far more blessed to give than to receive.
A critic is a necessary evil, and criticism is an evil necessity.