19. Here begins the third and last division of the Epistle; our duty now while waiting for the Lord's second advent. Resumption and expansion of the exhortation (Heb 4:14-16; compare Heb 10:22, 23 here) wherewith he closed the first part of the Epistle, preparatory to his great doctrinal argument, beginning at Heb 7:1.
      boldness--"free confidence," grounded on the consciousness that our sins have been forgiven.
      to enter--literally, "as regards the entering."
      by--Greek, "in"; it is in the blood of Jesus that our boldness to enter is grounded. Compare Eph 3:12, "In whom we have boldness and access with confidence." It is His having once for all entered as our Forerunner (Heb 6:20) and High Priest (Heb 10:21), making atonement for us with His blood, which is continually there (Heb 12:24) before God, that gives us confident access. No priestly caste now mediates between the sinner and his Judge. We may come boldly with loving confidence, not with slavish fear, directly through Christ, the only mediating Priest. The minister is not officially nearer God than the layman; nor can the latter serve God at a distance or by deputy, as the natural man would like. Each must come for himself, and all are accepted when they come by the new and living way opened by Christ. Thus all Christians are, in respect to access directly to God, virtually high priests (Re 1:6). They draw nigh in and through Christ, the only proper High Priest (Heb 7:25).

JFB.