Man has received direct from God only one instrument wherewith to know himself and to know his relation to the universe--he has no other--and that instrument is reason.
The unknown ... became for our primitive forefathers a terrible and omnipotent source of boons and calamities visited upon mankind for cryptic and wholly extra-terrestrial reasons, and thus clearly belonging to spheres of existence whereof we know nothing and wherein we have no part.
We disparage reason.
But all the time it's what we're most concerned with.
There's will as motor and there's will as brakes.
Reason is, I suppose, the steering gear.