As a day well spent makes sleep seem pleasant, so a life well employed makes death pleasant. A life well spent is long. - Leonardo da Vinci

As a well-spent day brings a happy sleep, so a well-employed life brings a happy death

As a well-spent day brings a happy sleep, so a well-employed life brings a happy death.

As a day well spent procures a happy sleep, so a life well employed procures a happy death.

The point, being indivisible, occupies no space. That which occupies no space is nothing. The limiting surface of one thing is the beginning of another.

It is impossible that the eye should project from itself, by visual rays, the visual virtue, since, as soon as it opens, that front portion [of the eye] which would give rise to this emanation would have to go forth to the object and this it could not do without time. And this being so, it could not travel so high as the sun in a month's time when the eye wanted to see it.

The acquisition of any knowledge is always of use to the intellect, because it may thus drive out useless things and retain the good. For nothing can be loved or hated unless it is first known.