For the dogmas of Philosophers when they have grown up, shew nothing of life or strength, but watery and insipid they grow into grasses and other greens, which quickly dry up and wither away. But the Gospel preaching, though it seem small in its beginning, when sown in the mind of the hearer, or upon the world, comes up not a garden herb, but a tree, so that the birds of the air (which we must suppose to be either the souls of believers or the Powers of God set free from slavery) come and abide in its branches. The branches of the Gospel tree which have grown of the grain of mustard seed, I suppose to signify the various dogmas in which each of the birds (as explained above) takes his rest. [margin note: Ps 55:6]
Let us then take the wings of the dove, that flying aloft we may dwell in the branches of this tree, and may make ourselves nests of doctrines, and soaring above earthly things may hasten towards heavenly.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).