Here, more than ever, we are all at sea, for want of a proper criterion.

What is to be the test of mind?
Indeed, mind and plasticity are almost the same thing.

Race, therefore, as being the stiffening in the evolution of life, might seem by its very nature opposed to mind as a limiting or obstructing force.

Are we, then, going to return to the old pre-scientific notion of soul as something alien to body, and thereby simply clogged, thwarted and dragged down?
That would never do.

Body and soul are, for the working purposes of science, to be conceived as in perfect accord, as co-helpers in the work of life, and as such subject to a common development.