Spinoza's Ethics: I.A3: Effect

This tying together of cause and effect seems incredibly tight and seems to be on the order of inherence. By that I mean that the effect seems almost present to the definite cause, as in the effect of roundness is in the definite cause of a circle. It seems that this cause-effect connection moves to level of immanence as opposed to transcendence; almost definitional rather than relational. The unfolding of cause and effect appears to inhere in the true nature of the cause.

Ex data causa determinata necessario sequitur effectus et contra si nulla detur determinata causa, impossibile est ut effectus sequatur.

Translated as,

From a given determinate cause the effect follows necessarily; and conversely, if there is no determinate cause, it is impossible for an effect to follow.