The wonder of it - we are being transformed (metamorphosed) into the same likeness as Christ!
These translations of 2 Cor. 3:18 are glorious reminders of what is going on...right now!
And all of us, as with unveiled face, [because we] continued [believe present tense is more accurate here] to behold [in the Word of God] as in a mirror the glory of the Lord, are constantly being transfigured into His very own image in ever increasing splendor and from one degree of glory to another [for this comes] from the Lord [Who is] the Spirit.
II Corinthians 3:18 (Amplified)
...and I really like the Arthur Way translation of this: "All of us, with face unveiled, gazing on the mirrored glory of our Lord, are hourly being transformed into the same likeness from a mere reflected glory into an inherent glory, as may well be, since it proceeds from the Lord, the Spirit." II Cor. 3:18
One more, from Conybeare: "...and we all, while with face unveiled we behold in a mirror the glory of the Lord, are ourselves transformed continually [the tense is present!] into the same likeness; and the glory which shines upon us is [now being] reflected by us, even as it proceeds from the Lord, the Spirit."
Do we really believe what we are being told here? If so, then surely it will make a difference in how we view our life in Christ, and HIS work in us (yes, it is HIS work, not our efforts. A God business, PTL). No more striving, but, rather resting in His work IN us, AS us.