(18) Do ye joy . . .--The Epistle lays great stress on joy, not only as a privilege, but as a duty, following from Christian faith and proving its reality. Joy is in itself natural in the first thoughts of childhood and youth; it is apt to be chequered or even destroyed by the second thoughts of fuller experience of life, as darkened by suffering, sin, and death; but in the third and deepest thoughts of the Christian, recognising these darker elements of life, but knowing that they were not in the beginning, and shall not be in the end, joy comes back, solemnised but deepened into thankfulness. A Christianity which has no power to rejoice, either in flashes of joy amidst tribulation, or, better still, in the calm steady light of cheerfulness, may be true, but is imperfect. It has not yet entered into the promise given by our Lord Himself of the "joy which no man taketh from us" (John 16:22).

Verse 18. - For the same cause also do ye joy, and rejoice with me; or, as R.V., in the manner. Their joy is to be like his, to mingle with his joy. The second clause may be rendered, as in Ver. 17, "and congratulate me."

2:12-18 We must be diligent in the use of all the means which lead to our salvation, persevering therein to the end. With great care, lest, with all our advantages, we should come short. Work out your salvation, for it is God who worketh in you. This encourages us to do our utmost, because our labour shall not be in vain: we must still depend on the grace of God. The working of God's grace in us, is to quicken and engage our endeavours. God's good-will to us, is the cause of his good work in us. Do your duty without murmurings. Do it, and do not find fault with it. Mind your work, and do not quarrel with it. By peaceableness; give no just occasion of offence. The children of God should differ from the sons of men. The more perverse others are, the more careful we should be to keep ourselves blameless and harmless. The doctrine and example of consistent believers will enlighten others, and direct their way to Christ and holiness, even as the light-house warns mariners to avoid rocks, and directs their course into the harbour. Let us try thus to shine. The gospel is the word of life, it makes known to us eternal life through Jesus Christ. Running, denotes earnestness and vigour, continual pressing forward; labouring, denotes constancy, and close application. It is the will of God that believers should be much in rejoicing; and those who are so happy as to have good ministers, have great reason to rejoice with them.For the same cause also do ye joy and rejoice with me. He would not have them be sorrowful, should they hear of his death for the sake of the Gospel, and of his blood being poured out in such a cause, since it was as a libation on their faith, and for the confirmation of it, and would be gain to Christ, and his interest, and to the apostle also: and therefore they should be so far from indulging grief and sorrow on that account, that they should rather joy and rejoice with him, who was ready to be offered up, or poured out; since he had run out his race, and that not in vain, but to so good a purpose, and especially among them.