A little knowledge is a dangerous thing - it only hastens fools to rush in where angels fear to tread.

Some have little power to do good, and have likewise little strength to resist evil.

Ignorance cannot always be inferred from inaccuracy; knowledge is not always present.

If a madman were to come into this room with a stick in his hand, no doubt we should pity the state of his mind; but our primary consideration would be to take care of ourselves. We should knock him down first, and pity him afterwards.

Language is only the instrument of science, and words are but the signs of ideas.

As every writer has his use, every writer ought to have his patrons; and since no man, however high he may now stand, can be certain that he shall not be soon thrown down from his elevation by criticism or caprice, the common interest of learning requires that her sons should cease from intestine hostilities, and, instead of sacrificing each other to malice and contempt, endeavour to avert persecution from the meanest of their fraternity.

To strive with difficulties, and to conquer them, is the highest human felicity; the next is, to strive, and deserve to conquer: but he whose life has passed without a contest, and who can boast neither success nor merit, can survey himself only as a useless filler of existence; ad if he is content with his own character, must owe his satisfaction to insensibility.