Criticism is futile because it puts a person on the defensive and usually makes them strive to justify themselves. Criticism is dangerous, because it wounds a person's precious pride, hurts their sense of importance, and arouses resentment.

'When you have a lemon, make a lemonade.' That is what a great educator does. But the fool does the exact opposite. If he finds that life has handed him a lemon, he gives up and says, 'I 'm beaten. It is fate. I haven't got a chance.' Then he proceeds to rail against the world and indulge in an orgy of self-pity .

So, to prevent fatigue and worry, the first rule is: Rest often. Rest before you get tired.

You cannot teach a man anything, you can only help him find it within himself.

Even god doesn't propose to judge a man till his last days, why should you and I?

One of the surest ways of making a friend and influencing the opinion of another is to give consideration to [his or her] opinion, let [him or her] sustain a feeling of importance.

Praise the slightest improvement and praise every improvement. Be hearty in your approbation and lavish in your praise.