When Oliver Cromwell wrote, on 3 August 1650 to the General Assembly of the Church of Scotland,

I beseech you, in the bowels of Christ, think it possible that you may be mistaken.

he was in fact paraphrasing Richard Hooker,

Think ye are Men, deem it not impoſſible for you to err; ſift unpartially your own hearts, whether it be force of Reaſon, or vehemency of Affection, which hath bred and ſtill doth feed theſe Opinions in you.

Preface [1594] § 9
Of the Lawes of Ecclesiastical Politie

(Underscore mine.) In Cromwell's time, and indeed for many years to follow, Hooker's work was widely known and widely respected, and Cromwell had every expectation that his allusion would be recognized for what it were.