How little we realize what we owe to the past for the things we enjoy to-day. It is wonderful and most interesting to look back and note the changes through which the human mind has passed during the steady and unfaltering tread of centuries, from the beginning down to the present time.
It requires the perspective of time to understand what all the changes meant, and from our present view-point we can understand it only as we hear through it all the sound of the still, small voice, which in its language of Love guided the weary marchers all the way, though they knew it not.
Just for the moment we will glance backward, and briefly review a few of the prominent stages of progress.
