William Blake, Songs of Experience: The Voice of the Ancient Bard

Youth of delight come hither.
And see the opening morn,
Image of truth new born.
4
Doubt is fled & clouds of reason.
Dark disputes & artful teazing,
Folly is an endless maze,
Tangled roots perplex her ways,
8
How many have fallen there!
They stumble all night over bones of the dead:
And feel they know not what but care;
And wish to lead others when they should be led.