"[...] Definition. When any given bodies of the same or different magnitude are compelled by other bodies to remain in contact, or if they be moved at the same or different rates of speed, so that their mutual movements should preserve among themselves a certain fixed relation, we say that such bodies are in union, and that together they compose one body or individual, which is distinguished from other bodies by this fact of union [...]
( Spinoza, Ethics)

INSAZIABILITA'

Insatiable in the fact of always looking for something deeper and deeper in the deep of a well, maybe the fount of knowledge…without beginning either end, bottomless. Our Insatiability is represented by a very long rope and an old bucket bottomless: bring down the bucket, and pull it up to surface without being able to contain…how many up and down in the depth of the well to quench our thirst !