Both are known today primarily for their poems. Donne also wrote prose meditations. Both did of course write sermons too. I don't know where off hand to find Herbert's sermons, but you can find *some* sermons by Donne here.

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Andrew Myers
Husband of Jessica, Father of Jackson, Katie and Samuel
Member, Presbyterian Reformed Church of Northern Virginia
Warrenton, VA USA
Editor, The Matthew Poole Project

"Let your Morning Thoughts, and your last Evening Thoughts, be what shall become of you to all Eternity." -- Matthew Poole