Philosophy is nothing else than striving through constant contemplation and saintly piety to attain knowledge of God.

Seek not to grow in knowledge chiefly for the sake of applause, and to enable you to dispute with others; but seek it for the benefit of your souls.

And last are the few whose delight is in meditation and understanding; who yearn not for goods, nor for victory, but for knowledge; who leave both market and battlefield to lose themselves in the quiet clarity of secluded thought; whose will is a light rather than a fire, whose haven is not power but truth: these are the men of wisdom, who stand aside unused by the world.

For my own part, without breach of truth or modesty, I may affirm that my life has been, on the whole, the life of a philosopher: from my birth I was made an intellectual creature, and intellectual in the highest sense my pursuits and pleasures have been, even from my schoolboy days.

Philosophy has taught me to rely on my own convictions rather than on the judgements of others and to concern myself less with whether I am well thought of than whether what I do or say is evil.

For it is owing to their wonder that men both now begin and at first began to philosophize; they wondered originally at the obvious difficulties, then advanced little by little and stated difficulties about the greater matters, e.g. about the phenomena of the moon and those of the sun and of the stars, and about the genesis of the universe. And a man who is puzzled and wonders thinks himself ignorant (whence even the lover of myth is in a sense a lover of Wisdom, for the myth is composed of wonders); therefore since they philosophized order to escape from ignorance, evidently they were pursuing science in order to know, and not for any utilitarian end. — Metaphysics by Aristotle – Book 1, ClassicalWisdom.com

A cultivated mind — I do not mean that of a philosopher, but any mind to which the fountains of knowledge have been opened, and which has been taught, in any tolerable degree, to exercise its faculties — finds sources of inexhaustible interest in all that surrounds it: in the objects of nature, the achievements of art, the imaginations of poetry, the incidents of history, the ways of mankind, past and present, and their prospects in the future.

I confess that I have as vast contemplative ends, as I have moderate civil ends: for I have taken all knowledge to be my province; and if I could purge it of two sorts of rovers, whereof the one with frivolous disputations, confutations, and verbosities, the other with blind experiments and auricular traditions and impostures, hath committed so many spoils, I hope I should bring in industrious observations, grounded conclusions, and profitable inventions and discoveries; the best state of that province. This, whether it be curiosity, or vain glory, or nature, or (if one take it favourably) philanthropia, is so fixed in my mind as it cannot be removed. And I do easily see, that place of any reasonable countenance doth bring commandment of more wits than of a man's own; which is the thing I greatly affect.

Acquire the contemplative way of seeing how all things change into one another, and constantly attend to it, and exercise thyself about this part [of philosophy]. For nothing is so much adapted to produce magnanimity. ...But as to what any man shall say or think about him, or do against him, he never even thinks of it, being himself contented with these two things: with acting justly in what he now does, and being satisfied with what is now assigned to him; and he lays aside all distracting and busy pursuits, and desires nothing else than to accomplish the straight course through the law, and by accomplishing the straight course to follow God.

I was too enamored of truth ever to mourn lost illusions.

I shall maintain that there simply is no such thing as philosophical knowledge, nor any philosophical way of knowing anything, and defend the humble point that philosophy is indeed the love of wisdom.

For my own part, without breach of truth or modesty, I may affirm, that my life has been, on the whole, the life of a philosopher: from my birth I was made an intellectual creature: and intellectual in the highest sense my pursuits and pleasures have been, even from my school-boy days. If opium-eating be a sensual pleasure, and if I am bound to confess that I have indulged in it to an excess, not yet recorded of any other man, it is no less true, that I have struggled against this fascinating enthralment with a religious zeal, and have, at length, accomplished what I never yet heard attributed to any other man - have untwisted, almost to its final links, the accursed chain which fettered me. Such a self-conquest may reasonably be set off in counterbalance to any kind of degree of self-indulgence.

I don't intend to let my intellect dominate me, and the last thing I want to do is worship knowledge or people who have knowledge! I don't give a damn for anyone's aggregation of facts, except that it be a reflection [of] basic sensitivity which I do demand... I intend to do everything... to have one way of evaluating experience — does it cause me pleasure or pain and I shall be very cautious about rejecting the painful — I shall anticipate pleasure everything and find it, too, for it is everywhere! I shall involve myself wholly... everything matters! The only thing I resign is the power to resign, to retreat: the acceptance of sameness and the intellect. I am alive... I am beautiful... what else is there?

…but all day long I would be training myself to think, to understand, to criticize, to know myself; I was seeking for the absolute truth: this preoccupation did not exactly encourage polite conversation.