Westminster Review, April, 1857. "Progress: its Law and Cause." See also Essays, vol. i.
It may be needful to remark, that by the proposed expression it is intended to define—not Life in its essence; but, Life as manifested to us—not Life as a noumenon: but, Life as a phenomenon. The ultimate mystery is as great as ever: seeing that there remains unsolved the question—What determines the co-ordination of actions?
Prin. of Phys., 2nd edit., p. 77.
Ibid., 3rd edit., p 249.
Ibid., p. 124.