Wisdom is the right use of knowledge. To know is not to be wise. Many men know a great deal, and are all the greater fools for it. There is no fool so great a fool as a knowing fool. But to know how to use knowledge is to have wisdom.
If a crooked stick is before you, you need not explain how crooked it is. Lay a straight one down by the side of it, and the work is well done. Preach the truth, and error will stand abashed in its presence.
Do not others expect from children more perfect conduct then they themselves exhibit? If a gracious child should lose his temper or act wrongly in some trifling thing through forgetfulness, straight-away he is condemned as a little hypocrite by those who are a long way from being perfect themselves.