In some faculties of mind he has been, and is, only a child.

But he is growing, and some things that were childish at the first are now of man's stature.

He is experimenting, and doing it well.

And if it had not been that we have crossed his path he would be yet, he may be yet if we fail, the father or furtherer of a new order of beings, whose road must lead through Death, not Life." Harker groaned and said, "And this is all arrayed against my darling! But how is he experimenting?
The knowledge may help us to defeat him!" "He has all along, since his coming, been trying his power, slowly but surely.

That big child-brain of his is working.