Becket alone was inflexible; and nothing but the interposition of the pope's legate and almoner, Philip, who dreaded a breach with so powerful a prince at so unseasonable a juncture, could have prevailed on him to retract the saving clause, and give a general and absolute promise of observing the ancient customs.
But Henry was not content with a declaration in these general terms; he resolved, ere it was too late, to define expressly those customs with which he required compliance, and to put a stop to clerical usurpations, before they were fully consolidated, and could plead antiquity, as they already did a sacred authority, in their favor.

The claims of the church were open and visible.

After a gradual and insensible progress during many centuries, the mask had at last been taken off, and several ecclesiastical councils, by their canons, which were pretended to be irrevocable and infallible, had positively defined those privileges and immunities which gave such general offence, and appeared so dangerous to the civil magistrate.

Henry, therefore, deemed it necessary to define with the same precision the limits of the civil power; to oppose his legal customs to their divine ordinances; to determine the exact boundaries of the rival jurisdictions; and for this purpose he summoned a general council of the nobility and prelates at Clarendon, to whom he submitted this great and important question.

[15th Jan.