At one first blow did shiver it as glasse.
Shakespeare uses the same simile in a different connexion:
Thy wit, that ornament to shape and love,
Mis-shapen in the conduct of them both:
Like powder in a skilless soldiers flaske,
Is set a fire by thine own ignorance,
And thou dismembred with thine owne defence.
Romeo and Juliet, III. iii. 130.
l. 14. and never chawes: 'chaw' is the form Donne generally uses: 'Implicite beleevers, ignorant beleevers, the adversary may swallow; but the understanding beleever, he must chaw, and pick bones, before he come to assimilate him, and make him like himself.' Sermons 80. 18. 178.