People that talk about good things without doing them are left out.

You are not master of addition until your addition is to be depended upon." The boy found it hard to fix his attention: to fix it on something he did not yet understand, would be too hard! he must learn to do so in the pursuit of accuracy where he already understood! then he would not have to fight two difficulties at once--that of understanding, and that of fixing his attention.

But for a long time he never kept him more than a quarter of an hour at work on the same thing.
When he had done the sum correctly, and a second without need of correction, he told him to lay his slate aside, and he would tell him a fairy-story.

Therein he succeeded tolerably--in the opinion of Davie, wonderfully: what a tutor was this, who let fairies into the school-room! The tale was of no very original construction--the youngest brother gaining in the path of righteousness what the elder brothers lose through masterful selfishness.

A man must do a thing because it is right, even if he die for it; but truth were poor indeed if it did not bring at last all things subject to it! As beauty and truth are one, so are truth and strength one.