For ye are dead, and your life is hid with Christ in God.
(Greek aorist) 'For ye died once for all,' in your Head, Christ (Romans 6:4; Romans 6:7; Romans 6:10), with whom ye are one by faith (Colossians 2:12; Colossians 2:20). Not, Ye must die practically to the world in order to become dead with Christ; but the latter is assumed as once for all accomplished by Christ, our Representative, with whom we become identified in regeneration: then, develop this spiritual life in practice. 'No one longs for eternal, incorruptible, and immortal life, unless he be wearied of this temporal, corruptible, and mortal life' (Augustine).
Your life (hath been and) is, х kekruptai (G2928): perfect, expressing the continuous state consequent on the previous aorist]
Hid (Psalms 83:3) - like a seed buried in the earth (cf. "planted," Romans 6:5). Compare Matthew 13:31; Matthew 13:33, "like unto leaven ... hid." Since Christ's glory now is hidden from the world, so the believer's real inner life, in communion with Him, is hidden with Christ in God (the element and sphere in which the life is hid: 'in God,' at whose right hand Christ sitteth, Colossians 3:1, the express image of His person); but (Colossians 3:4) when Christ, its Source and Essence, shall manifest Himself in glory, then shall their hidden life be manifest. The Christian's secret communion with God now at times makes itself seen without his intending it (Matthew 5:14; Matthew 5:16); but his full manifestation is at Christ's (Matthew 13:43; Romans 8:19-23): his manifested life will be the natural development of his present inner life; "glory" will be its prominent characteristic (1 Corinthians 15:43). 'It is not yet manifested what we shall be' (1 John 3:2; 1 Peter 1:7). As yet Christians do not always recognize the "life" of manifested what we shall be' (1 John 3:2; 1 Peter 1:7). As yet Christians do not always recognize the "life" of one another, and even at times doubt as to their own, (Psalms 51:1-19; Romans 7:1.)