I live in the crowd of jollity, not so much to enjoy company as to shun myself.

The labor of rising from the ground will be great, ... but as we mount higher, the earth's attraction, and the body's gravity, will be gradually diminished till we arrive at a region where the man will float in the air without any tendency to fall.

Youth enters the world with very happy prejudices in her own favor. She imagines herself not only certain of accomplishing every adventure, but of obtaining those rewards which the accomplishment may deserve. She is not easily persuaded to believe that the force of merit can be resisted by obstinacy and avarice, or its luster darkened by envy and malignity.

To scatter praise or blame without regard to justice is to destroy the distinction of good and evil. Many have no other test of actions than general opinion; and all are so far influenced by a sense of reputation that they are often restrained by fear of reproach, and excited by hope of honour, when other principles have lost their power.

I am far from any intention to limit curiosity, or confine the labours of learning to arts of immediate and necessary use. It is only from the various essays of experimental industry, and the vague excursions of mind set upon discovery, that any advancement of knowledge can be expected; and though many must be disappointed in their labours, yet they are not to be charged with having spent their time in vain; their example contributed to inspire emulation, and their miscarriage taught others the way to success.

When making your choice in life, do not neglect to live.

To revenge reasonable incredulity by refusing evidence, is a degree of insolence with which the world is not yet acquainted; and stubborn audacity is the last refuge of guilt.