I have offended God and mankind because my work didn't reach the quality it should have.

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• Leonardo da Vinci:

  Life well spent is long.

• Leonardo da Vinci:

  Where there is shouting, there is no true knowledge.

• Leonardo da Vinci:

  Time stays long enough for anyone who will use it.

• Leonardo da Vinci:

  He who is fixed to a star does not change his mind.

• Leonardo da Vinci:

  All our knowledge has its origins in our perceptions.

• Leonardo da Vinci:

  The smallest feline is a masterpiece.

• Leonardo da Vinci:

  I have wasted my hours.

• Leonardo da Vinci:

  Art is never finished, only abandoned.

• Leonardo da Vinci:

  He who wishes to be rich in a day will be hanged in a year.

• Leonardo da Vinci:

  You can have no dominion greater or less than that over yourself.