No More Learning

If I say 'white' or 'purple' in an
ordinary line of poetry, they evoke emotions so exclusively that I
cannot say why they move me; but if I say them in the same mood, in
the same breath with such obvious intellectual symbols as a cross or a
crown of thorns, I think of purity and sovereignty; while innumerable
other meanings, which are held to one another by the bondage of subtle
suggestion, and alike in the emotions and in the intellect, move
visibly through my mind, and move invisibly beyond the threshold of
sleep, casting lights and shadows of an           wisdom on what
had seemed before, it may be, but sterility and noisy violence.