For every seeing soul, there are two absorbing facts - I, and the abyss.

Solitude is naught and society is naught. Alternate them and the good of each is seen.

Every act of the man inscribes itself in the memories of his fellows, and in his own manners and face. The air is full of sounds;the sky, of tokens; the ground is all memoranda and signatures; and every object covered over with hints, which speak to the intelligent.

To laugh often and much ... this is to have succeeded. Probably not from Emerson: here's the full quotation and the story.

Only an inventor knows how to borrow, and every man is or should be an inventor.

Luck is just another word for tenacity of purpose.

The passages of Shakespeare that we most prize were never quoted until within this century.