Natural selection is not the wind which propels the vessel, but the rudder which, by friction, now on this side and now on that, shapes the course.
Asa GrayThis substance, which is manifold in its forms and protean in its transformations, has, in its state of living matter, one physiological name which has become familiar, that of protoplasm.
Asa GrayIt remains to consider what attitude thoughtful men and Christian believers should take respecting them, and how they stand related to beliefs of another order.
Asa Gray