"Neu brevier quinto, neu sit productior actu: "So that you see, the Grecians cannot be said to have consumated this Art: writing rather by Entrances than by Acts; and having rather a general indigested notion of a Play, than knowing how and where to bestow the particular graces of it.

"The fact isthey have rebelled before," replied the Dominican, "and ab actu ad posse valet illatio!"

Phr. ab actu ad posse valet consecutio

He hath the abilities of the mind in potentia, and actu nothing but boldness.

The next morning his man (in actu or potentia) enjoys his pickadels.

But the notion of the vortex in the ether may perhaps help us to a glimpse of Spinoza's notion when he speaks of a "res singularis in actu" a creature of individual functions.

[Footnote 19: "Rei alicujus singularis actu existentis."