"Evolution proceeds on three general lines: the spiritual, the mental-emotional,and the astral-vital; and the physical body is the channel through which all these in wrapped capacities, tendencies, and powers, express themselves on the physical plane, if the environment at any particular moment or at any particular passage of time be appropriate and fit for the expression of this or that or of some other such attribute, power, or faculty. The combination of these two — the inner urge, the drive, and a fit and appropriate environment or field— means the evolving, the coming out into manifestation, the expression, of those inner forces or powers. As is evident, this includes a far wider and vaster conception of evolution than any that has hitherto been entertained in the ranks of scientific researchers."