Answer: “…‘Twere profanation of our joys/To tell the laity our love.”
Step-by-step explanation:
From the given excerpts from "A Valediction: Forbidding Mourning" by John Donne, the one where the speaker tell his wife why she should keep his departure a secret is ""...'Twere profanation of our joys/To tell the laity our love" in that phrase he is implying that their happiness would be interrupted or "profaned" if she told anyone about their love and their departure.