He who rides and keeps the beaten track studies the fences chiefly.

We need the tonic of wildness.

We sometimes meet uncivil men, children of Amazons, who dwell by mountain paths, and are said to be inhospitable to strangers; whose salutation is as rude as the grasp of their brawny hands, and who deal with men as unceremoniously as they are wont to deal with the elements. They need only extend their clearings, and let in more sunlight, to seek out the southern slopes of the hills, from which they may look down on the civil plain or ocean, and temper their diet duly with the cereal fruits, consuming less wild meat and acorns, to become like the inhabitants of cities.

You must speak loud to those who are hard of hearing.

If it is necessary, omit one bridge over the river, go round a little there, and throw one arch at least over the darker gulf of ignorance which surrounds us.

Philosophy, having crept clinging to the rocks so far, puts out its feelers many ways in vain.

How insupportable would be the days, if the night with its dews and darkness did not come to restore the drooping world. As the shades begin to gather around us, our primeval instincts are aroused, and we steal forth from our lairs, like the inhabitants of the jungle, in search of those silent and brooding thoughts which are the natural prey of the intellect.