Power that is not of God, however great,
Is but the downward rushing and the glare
Of a swift meteor that hath lost its share
In the one impulse which doth animate
The parent mass: emblem to me of fate!
Which through vast nightly wastes doth onward fare,
Wild-eyed and headlong, rent away from prayer-
A moment brilliant, then most desolate!
And, O my brothers, shall we ever learn
From all the things we see continually
That pride is but the empty mockery
Of what is strong in man! Not so the stern
And sweet repose of soul which we can earn
Only through reverence and humility!

George MacDonald

http://www.poemhunter.com/poem/power-44/