Leonardo da Vinci: Necessity is the mistress and guardian of Nature.

Necessity is the mistress and guardian of Nature. — Leonardo da Vinci

Necessity is the mistress and guardian of Nature.
The eye can best distinguish the forms of objects when it is placed between the — Leonardo da Vinci
The man who blames the supreme certainty of mathematics feeds on confusion, and — Leonardo da Vinci
Experience never errs ; it is only your judgments that err by promising themselv — Leonardo da Vinci
A luminous body will appear more brilliant in proportion as it is surrounded by — Leonardo da Vinci
One must be something in order to do something. — Johann Wolfgang von Goethe
They must needs go whom the Devil drives. — Miguel de Cervantes
No production without a need. But consumption reproduces the need. — Karl Marx
That which is not allotted the hand cannot reach; and what is allotted you will — Saadi
Qui finem quæris amoris, (Cedit amor rebus) res age; tutus eris. If thou wishest — Ovid
Sigh no more, ladies, sigh no more, Men were deceivers ever; One foot in sea, an — William Shakespeare
Silence is not always a Sign of Wisdom, but Babbling is ever a Mark of Folly. — Benjamin Franklin
I pass times, I pass silences, formless worlds pass me by. — Fernando Pessoa