O how I laugh when I think of my vague indefinite riches. No run on my bank can drain it, for my wealth is not possession but enjoyment.

There never is but one opportunity of a kind.

Let us consider under what disadvantages Science has hitherto labored before we pronounce thus confidently on her progress.

I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived. I did not wish to live what was not life, living is so dear; nor did I wish to practise resignation, unless it was quite necessary. I wanted to live deep and suck out all the marrow of life, to live so sturdily and Spartan-like as to put to rout all that was not life, to cut a broad swath and shave close, to drive life into a corner, and reduce it to its lowest terms.

What a battle a man must fight everywhere to maintain his standing army of thoughts, and march with them in orderly array throughthe always hostile country! How many enemies there are to sane thinking! Every soldier has succumbed to them before he enlists for those other battles.

The civilized nations--Greece, Rome, England--have been sustained by the primitive forests which anciently rotted where they stand. They survive as long as the soil is not exhausted. Alas for human culture! little is to be expected of a nation, when the vegetable mould is exhausted, and it is compelled to make manure of the bones of its fathers. There the poet sustains himself merely by his own superfluous fat, and the philosopher comes down on his marrow-bones.

Most men lead lives of quiet desperation and go to the grave with the song still in them.