"Beholding beauty with the eye of the mind, he will be enabled to bring forth, not images of beauty, but realities (for he has hold not of an image but of a reality), and bringing forth and nourishing true virtue to become the friend of God and be immortal, if mortal man may."

"The purpose of education is to give to the body and to the soul all the beauty and all the perfection of which they are capable."

"I don't think we shall quarrel about a word the subject of our inquiry is too important for that."

"The harder you work, the luckier you get."

"The wise man will want to be ever with him who is better than himself."

"Lust is inseparably accompanied with the troubling of all order, with impudence, unseemliness, sloth, and dissoluteness."

"God is the cause only of good."

"Beholding beauty with the eye of the mind, he will be enabled to bring forth, not images of beauty, but realities (for he has hold not of an image but of a reality), and bringing forth and nourishing true virtue to become the friend of God and be immortal, if mortal man may."

"Just as it would be madness to settle on medical treatment for the body of a person by taking an opinion poll of the neighbors, so it is irrational to prescribe for the body politic by polling the opinions of the people at large."

"The harder you work, the luckier you get."

"Astronomy compels the soul to look upwards and leads us from this world to another."

"Science is nothing but perception."

"Think only of the ambition of men, and you will wonder at the senselessness of their ways, unless you consider how they are stirred by the love of an immortality of fame. They are ready to run all risks greater far than they would have run for their children, and to spend money and undergo any sort of toil, and even to die, for the sake of leaving behind them a name which shall be eternal."

"It is a common saying, and in everybody's mouth, that life is but a sojourn. The learning and knowledge that we have, is, at the most, but little compared with that of which we are ignorant."

"No intelligent man will ever be so bold as to put into language those things which his reason has contemplated."

"I exhort you also to take part in the great combat, which is the combat of life, and greater than every other earthly conflict."

"Evil is the vulgar lover who loves the body rather than the soul, inasmuch as he is not even stable, because he loves a thing which is in itself unstable, and therefore when the bloom of youth which he was desiring is over, he takes wing and flies away, in spite of all his words and promises; whereas the love of the noble disposition is life-long, for it becomes one with the everlasting."

"Those who don't know must learn from those who do."

"Either we shall find what it is we are seeking or at least we shall free ourselves from the persuasion that we know what we do not know."

"He who commits injustice is ever made more wretched than he who suffers it."