What is it about a fact that allows us to write it down?
By this aspect, it is known.
And what is it about an act that lets us put it in writing?
In this manner,* we master it.

____
*I had previously written "By this conceit" because I needed a "grasp" (ceit = cept) to go with the "look" (spect). I wasn't happy with it because "concept" belongs with knowledge, not power. Then "manner" occured to me and I looked it up: "manus" (hand).