Knowledge, Power, Self-Control

In casual contexts, the phrase 'Knowledge is Power' tends to connote 'Information is advantageous', while for a scientist, it signifies the applicability of Theory to Practice.  For Spinoza, it expresses an equivalence--Knowledge is possession of Adequate Ideas, an Adequate Idea is efficacious, and efficacy is Power.  It is, thus, also, an active condition, i. e. it activates, which, in a finite entity involves the overcoming of passivity, i. e. of external influence, experienced as Inadequate Ideas.  Thus, in humans, Knowledge and Power both entail self-control, aka 'Freedom' in Spinoza's system.