“Whosoever therefore shall confess me before men,” He says, “him will I confess also before my Father which is in heaven” (Matt. 10.32).
Notice that we cannot boldly proclaim our faith in Christ and confess Him without His strength and assistance. Nor will Our Lord Jesus Christ speak out on our behalf in the age to come, recommend us to the heavenly Father and make us His kin, unless we give Him reason to do so. To make this clear, He does not say, “Whosoever shall confess me before men”, but “Whosoever shall make his confession in Me” (Matt. 10:32), that is to say, whoever is able, in Christ and with His help, to declare his faith with boldness. Likewise, again, He does not say, “I will confess him”” but “I will acknowledge what is in him“, meaning that His confession will be in respect of the good fight and patient endurance which such a person has shown in the cause of godliness.
Take note, however, of what He goes on to say about those who are cowardly and betray the Faith: “But whosoever shall deny me before men, him will I also deny before my Father which is in heaven” (Matt. 10:33). Here He does not say, “Whosoever shall deny in Me”, since the person who denies God does so because he is bereft of God’s help. Why has he been abandoned and forsaken by God? Because he first abandoned God by loving what is transitory and worldly more than the heavenly and everlasting good things promised by Him. In His turn, Christ will not just disown what is in him, but deny him himself, finding in him nothing at all that could be used in his defense.
(St. Gregory Palamas, The Homilies, pp. 200-201)