From henceforth expecting till his enemies be made his footstool.
Expecting, х ekdechomenos (G1551)] - the Son 'awaiting' the fulfillment of the divine promise (Psalms 110:1) until the Father shall 'send Him forth to triumph over all His foes.' He is now sitting at rest (Hebrews 10:12), invisibly reigning, having His foes virtually, by right of His death, subject. This is a necessary preliminary to His coming forth to His visibly manifested kingdom and conquest over his foes. He is, by His Spirit and His providence, now subjecting them in part, The subjection fully shall be at His second advent, and from that time to the general judgment (Revelation 19:1-21; Revelation 20:1-15); then comes the subjection of Himself, as Head of the Church, to the Father (the Mediatorial economy ceasing when its end shall have been accomplished), that God may be all in all. Eastern conquerors used to tread on the necks of the vanquished, as Joshua did to the five kings. So Christ's absolute conquest is symbolized.
His enemies - Satan and Death, whose strength consists in 'sin:' this being taken away (Hebrews 10:12), their power is taken away; their destruction necessarily follows.
Be made his footstool - literally, 'be put footstool of His feet.'