P23: Every mode which exists necessarily and is infinite has necessarily had to follow either from the absolute nature of some attribute of God/Nature, or from some attribute, modified by a modification which exists necessarily and is infinite.

Dem.: For a mode is in another, through which it must be conceived (by D5), i.e. (by P15), it is in God/Nature alone, and can be conceived through God/Nature alone. So if a mode is conceived to exist necessarily and be infinite, {its necessary existence and infinitude} must necessarily be inferred, or perceived through some attribute of God/Nature, insofar as that attribute is conceived to express infinity and necessity of existence, or (what is the same, by D8) eternity, i.e. (by D6 and P19), insofar as it is considered absolutely. Therefore, the mode, which exists necessarily and is infinite, has had to follow from the absolute nature of some attribute of God/Nature—either immediately (see P21) or by some mediating modification, which follows from its absolute nature, i.e. (by P22), which exists necessarily and is infinite, q.e.d.