Philosophy is harmonized knowledge making a harmonious life; it is the self-discipline which lifts us to serenity and freedom. Knowledge is power, but only wisdom is liberty.
Beyond a wholesome discipline, be gentle with yourself. You are a child of the universe, no less than the trees or the stars; you have a right to be here.
It was not just the Church that resisted the heliocentrism of Copernicus. Many prominent figures, in the decades following the 1543 publication of De Revolutionibus, regarded the Copernican model of the universe as a mathematical artifice which, though it yielded astronomical predictions of superior accuracy, could not be considered a true representation of physical reality: "If Nicolaus Copernicus, the distinguished and incomparable master, in this work had not been deprived of exquisite and faultless instruments, he would have left us this science far more well-established. For he, if anybody, was outstanding and had the most perfect understanding of the geometrical and arithmetical requisites for building up this discipline. Nor was he in any respect inferior to Ptolemy; on the contrary, he surpassed him greatly in certain fields, particularly as far as the device of fitness and compendious harmony in hypotheses is concerned. And his apparently absurd opinion that the Earth revolves does not obstruct this estimate, because a circular motion designed to go on uniformly about another point than the very center of the circle, as actually found in the Ptolemaic hypotheses of all the planets except that of the Sun, offends against the very basic principles of our discipline in a far more absurd and intolerable way than does the attributing to the Earth one motion or another which, being a natural motion, turns out to be imperceptible. There does not at all arise from this assumption so many unsuitable consequences as most people think."
Tycho Brahe
Source: Letter to Christopher Rothman, January 20, 1587
The great end of education is to discipline rather than to furnish the mind; to train it to the use of its own powers, rather than fill it with the accumulation of others.
When a person does not think, "Where shall I put it?" the mind will extend throughout the entire body and move to any place at all. . . . The effort not to stop the mind in just one place - this is discipline. Not stopping the mind is object and essence. Put it nowhere and it will be everywhere. Even in moving the mind outside the body, if it is sent in one direction, it will be lacking in nine others. If the mind is not restricted to just one direction, it will be in all ten.
Takuan Soho (1573 - ?)
Source: Takuan Soho in The Unfettered Mind. Trans. W. S. Wilson. Tokyo, 1986., p 62