_The Vision of Sir Launfal_ and the _Fable for Critics_, published in
the same year, illustrate the two dominant and strikingly contrasted
qualities of his nature, a contrast of opposites which he himself
clearly perceived. "I find myself very curiously compounded of two
utterly distinct characters. One half of me is clear mystic and
enthusiast, and the other, humorist," and he adds that "it would have
taken very little to have made a Saint Francis" of him. It was the
Saint Francis of New England, the moral and spiritual enthusiast in
Lowell's nature that produced the poem and gave it power. Thus we see
that notwithstanding its antique style and artificial structure, it
was a perfectly direct and spontaneous expression of himself.

The allegory of the _Vision_ is easily interpreted, in its main
significance. There is nothing original in the lesson, the humility of
true charity, and it is a common criticism that the moral purpose of
the poem is lost sight of in the beautiful nature pictures. But a
knowledge of the events which were commanding Lowell's attention at
this time and quickening his native feelings into purposeful utterance
gives to the poem a much deeper significance. In 1844, when the
discussion over the annexation of Texas was going on, he wrote _The
Present Crisis_, a noble appeal to his countrymen to improve and
elevate their principles. During the next four years he was writing
editorially for the _Standard_, the official organ of the Anti-Slavery
Society, at the same time he was bringing out the _Biglow Papers_. In
all these forms of expression he voiced constantly the sentiment of
reform, which now filled his heart like a holy zeal. The national
disgrace of slavery rested heavily upon his soul. He burned with the
desire to make God's justice prevail where man's justice had failed.
In 1846 he said in a letter, "It seems as if my heart would break in