This quote is commonly attributed to Leonardo da Vinci, but I have not been able to locate a primary source. Use with caution in academic or professional contexts.
“A man is worthy of praise or blame solely on account of those actions which lie within his power to do or not to do.”
— Leonardo da Vinci Primary source“Wisdom is the daughter of experience.”
— Leonardo da Vinci Primary source“Any one who in discussion relies upon authority uses, not his understanding, but rather his memory.”
— Leonardo da Vinci Primary source“Just as iron rusts unless it is used, and water putrifies or, in cold, turns to ice, so our intellect spoils unless it is kept in use.”
— Leonardo da Vinci Primary sourceMore quotes by Leonardo da Vinci →
“Never trouble another for what you can do yourself.”
— Thomas Jefferson Primary source“The golden age never was the present age.”
— Benjamin Franklin Primary source“Art is never finished, only abandoned.”
— Leonardo da Vinci Disputed“Insist on yourself; never imitate.”
— Ralph Waldo Emerson Primary sourceLearning Knowledge Energy Curiosity