O speculators about perpetual motion, how many vain chimeras have you created in the like quest? Go and take your place with the seekers after gold.
Leonardo da VinciA painter should begin every canvas with a wash of black, because all things in nature are dark except where exposed by the light.
Leonardo da VinciTruth at last cannot be hidden. Dissimulation is of no avail. Dissimulation is to no purpose before so great a judge. Falsehood puts on a mask. Nothing is hidden under the sun.
Leonardo da Vinci