selfsame reason they do not exert sufficiently powerful pressure on the Socialist Party.

It follows that we must call this selfsame essence, at once individual and universal, substance - a conclusion, however, which Aristotle never drew in so many words, though he continued always to call essence substance, and definition a knowledge of substance.

Each natural substance is a formal cause, as being what it is; a material cause, as having passive power to be changed; an efficient cause, as having active power to change, by communicating the selfsame essence into different matter so as to produce therein a homogeneous effect in the same species; and a final cause, as an end to be realized.

selfsame day.

They sailed there, without effort, completed their task, and returned home the selfsame day.