To be taught to read—what is the use of that, if you know not whether what you read is false or true? To be taught to write or to speak—but what is the use of speaking, if you have nothing to say? To be taught to think—nay, what is the use of being able to think, if you have nothing to think of? But to be taught to see is to gain word and thought at once, and both true.

the true knowledge is disciplined and tested knowledge,—not the first thought that comes, so the true passion is disciplined and tested passion,—not the first passion that comes. The first that come are the vain, the false, the treacherous; if you yield to them they will lead you wildly and far, in vain pursuit, in hollow enthusiasm, till you have no true purpose and no true passion left. Not that any feeling possible to humanity is in itself wrong, but only wrong when undisciplined.

To be content in utter darkness and ignorance is indeed unmanly, and therefore we think that to love light and find knowledge must always be right. Yet wherever pride has any share in the work, even knowledge and light may be ill pursued. Knowledge is good, and light is good: yet man perished in seeking knowledge, and moths perish in seeking light; and if we, who are crushed before the moth, will not accept such mystery as is needful to us, we shall perish in like manner.

Science is the knowledge of constant things, not merely of passing events, and is properly less the knowledge of general laws than of existing facts.

You will find that the mere resolve not to be useless, and the honest desire to help other people, will, in the quickest and delicatest ways, improve yourself.