Perspective is the rein and rudder of painting.

Who sows virtue reaps honor.

Truth 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.

Make an effort to collect the good features from many beautiful faces.

Let proportion be found not only in numbers and measures, but also in sounds, weights, times, and positions, and what ever force there is.

There is no object so large but that at a great distance from the eye it does not appear smaller than a smaller object near.

As every divided kingdom falls, so every mind divided between many studies confounds and saps itself.