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“In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.”
― Galileo Galilei

“One can have no smaller or greater mastery than mastery of oneself.”
― Leonardo da Vinci

“I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use.”
― Galileo Galilei, Letter to the Grand Duchess Christina

“One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the beloved object, and if you know it but little you will be able to love it only a little or not at all.”
― Leonardo DaVinci