Therefore they believe and love, and so stand toward Him in the true and proper relations of faith and love.
This undoubtedly gives them boldness to hope for praise, honor, and glory at His revelation.
This faith and love toward the Savior whom they have not seen fill their souls with the greatest joy. It is the feeling of those who do not see and yet believe, according to Christ’s word cited above.
The Apostles rejoiced when they saw the risen Lord (Jn 20:20). The Lord praised the faith of those who had not seen and yet believed.
Peter, by showing that those who believe and love without seeing rejoice, thereby calls their faith blessed, as the Lord also did.
“If,” he says, “not having seen Him with bodily eyes, you love Him by hearing alone, what love will you feel when you see Him, and see Him appearing in glory?
If His sufferings have bound you to Him so strongly, what attachment must His appearing in unbearable radiance produce in you, when the salvation of souls is also given to you as a reward?
If you are to appear before Him and be deemed worthy of such glory, then now show patience corresponding to it. You will fully attain the goal set before you” (Theophylact).
“With joy inexpressible and full of glory.” These expressions, in contrast to vain and insignificant worldly joy, indicate a joy free from everything impure and disturbing.
It is a joy that already bears glory within itself (v. 7), and at the same time serves as a pledge of that glory.