In the present life those who are blessed are perfect in relation to God in respect of their will, but not yet with respect to the activity of their mind. One may find perfect love in them, but by no means pure contemplation of God. If, however, that which is in the future is present with them while they yet live in the body, they already experience the prize, yet not continually or perfectly, since this life does not permit it. For this cause Paul says, “we rejoice in hope” (Rom. 12:13), and “we walk by faith, not by sight” (2 Cor. 5:7), and “we know in part” (1 Cor. 13:9). Even though he had seen Christ (1 Cor. 9:1, 15:8), yet he did not enjoy this vision at all times.
For “always” looks to the future only, and this he himself showed when he spoke of Christ’s presence, saying, “and so shall we always be with the Lord” (1 Thess. 4:17). Thus, anyone who is in Christ and has received eternal life has it through his will, and through love he will arrive at the ineffable joy. He has the pure vision of the mind in store for the future while faith leads him on to love. This the blessed Peter shows, saying, “though you do not see Him you believe in Him and rejoice with unutterable and exalted joy” (1 Pet. 1:8). (St. Nicholas Cabasilas, The Life in Christ, pp. 226-227)