We shun the rugged battle of fate where strength is born.

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

You send your child to the schoolmaster, but 'tis the schoolboys who educate him. You send him to the Latin class, but much of histuition comes, on his way to school, from the shop- windows.

Health is the first muse, and sleep is the condition to produce it.

The lover of letters loves power too.

Plato is philosophy, and philosophy, Plato,--at once the glory and the shame of mankind, since neither Saxon nor Roman have availed to add any idea to his categories.

In the morning a man walks with his whole body; in the evening, only with his legs.