Do what thou dost as if the earth were heaven, and thy last day the day of judgment.

You are literally filled with the fruit of your own devices, with rats and mice and such small deer, paramecia, and entomostraceæ, and kicking things with horrid names, which you see in microscopes at the Polytechnic, and rush home and call for brandy-without the water-stone, and gravel, and dyspepsia, and fragments of your own muscular tissue tinged with your own bile.

If you wish to be like a little child, study what a little child could understand — nature; and do what a little child could do — love.

Except a living man, there is nothing more wonderful than a book.

Do today's duty, fight to-day's temptation; and do not weaken and distract yourself by looking forward to things which you cannot see, and could not understand if you saw them.

No earnest thinker is a plagiarist pure and simple. He will never borrow from others that which he has not already, more or less, thought out for himself.

You are not very good if you are not better than your best friends imagine you to be.