What is written in the word must be in them in deed. To look at them must be the same as to hear or read the word of life.
Of some who faithfully fulfilled the apostolic word, the Apostle said: you are my epistle, written not with ink (cf. 2 Cor 3:2).
In a similar sense he called the Apostles “the fragrance of Christ” (cf. 2 Cor 2:15). By the scent of a rose people guess that somewhere nearby there is a rose.
So by the Apostles and all faithful Christians people recognize that Christ exists, and what He is.
Saint Paul leads the mind to all this and similar things when he says, “holding fast the word of life.”
It is as though he said: you will truly be lights if you realize within yourselves the evangelical word of life, and if you live worthily of the Gospel.
Chrysostom expressed it thus: “Having within yourselves the seed of life, holding the pledge of life, holding life itself. This is what we call the word of life.”
“As a boast for me in the day of Christ.” In saying this, the Apostle expresses hope that they will hold to the word they received until the end and conduct their life according to it.
What is the boast? That he formed such disciples and established them so firmly that they remained firm until the end.
The Apostle was not concerned for his own praise, but with stirring up zeal in them for constancy in good and faithfulness to the Christian calling.
Under these words he conveys this exhortation to them: see, then, that you stand in the word until the end.
“That I did not run in vain or labor in vain.” By his running he means his apostolic labors.
If you always remain in the word, he says, then my labors for your conversion and support in the faith will not be in vain.
In the day of Christ I can point to you as my boast, that I did not labor over you in vain, or that I did not bear the apostolic rank in vain.
The aim of apostleship is to bring people to Christ and make them saved. If you prove to be such, then you alone will redeem all my running.
If no others are found, but you alone are found, even then I shall not be deprived of approval.
For then the fact that there are no others will mean that the lack of success did not depend on me, but on those who heard the word.
You will prove by yourselves that I knew how to teach. If I had not known how, I would not have made you true followers of Christ.
The Apostle inserts a word about himself because of the Philippians’ love for him, knowing that out of love for him they are ready to do everything.
They will begin to live as they should from this motive, and then they will reach other foundations, namely, that one must live so and not otherwise.
But one may place a period after “as a boast for me in the day of Christ,” as in our Slavonic translation. Then “that” may be translated not as “that,” but as “because” or “for.”
For I have not run in vain and have not labored in vain.
The thought will be the same as in the Epistle to the Corinthians: “I therefore so run, not as uncertainly; so I fight, not as beating the air” (cf. 1 Cor 9:26).
That is, I run in full, clear, and unshakable confidence that I shall receive the incorruptible crown (cf. 1 Cor 9:25).
So here also Saint Paul expresses confidence that the Philippians, fulfilling all that has been written and holding fast the word of life, will be his boast in the day of Christ.
For, he says, until now I have run in the apostolic rank not uncertainly, not without a definite goal and hope, and have not labored in preaching to the wind.
I fulfill the definite will of God. I know truly that I do what is pleasing to Him, and that the work of my ministry will have a blessed end.
By setting this forth in relation to himself, he also inspires them with the same blessed hopes. For if his labor in preaching will be crowned, then their following of this preaching will also be crowned.
The next two texts are closer to this understanding.