Римлянам 5:6

For when we were yet without strength--that is, powerless to deliver ourselves, and so ready to perish. in due time--at the appointed season. Christ died for the ungodly--Three signal properties of God's love are here given: First, "Christ died for the ungodly," whose character, so far from meriting any interposition in their behalf, was altogether repulsive to the eye of God; second, He did this "when they were without strength"--with nothing between them and perdition but that self-originating divine compassion; third, He did this "at the due time," when it was most fitting that it should take place (compare Gal 4:4), The two former of these properties the apostle now proceeds to illustrate.

The apostle here describes the fountain and foundation of justification, laid in the death of the Lord Jesus. The streams are very sweet, but, if you run them up to the spring-head, you will find it to be Christ's dying for us; it is in the precious stream of Christ's blood that all these privileges come flowing to us: and therefore he enlarges upon this instance of the love of God which is shed abroad. Three things he takes notice of for the explication and illustration of this doctrine: - 1. The persons he died for, Rom 5:6-8. 2. The precious fruits of his death, Rom 5:9-11. 3. The parallel he runs between the communication of sin and death by the first Adam and of righteousness and life by the second Adam, Rom 5:12, to the end. I. The character we were under when Christ died for us. 1. We were without strength (Rom 5:6), in a sad condition; and, which is worse, altogether unable to help ourselves out of that condition - lost, and no visible way open for our recovery - our condition deplorable, and in a manner desperate; and, therefore our salvation is here said to come in due time. God's time to help and save is when those that are to be saved are without strength, that his own power and grace may be the more magnified, Deu 32:36. It is the manner of God to help at a dead lift, 2. He died for the ungodly; not only helpless creatures, and therefore likely to perish, but guilty sinful creatures, and therefore deserving to perish; not only mean and worthless, but vile and obnoxious, unworthy of such favour with the holy God. Being ungodly, they had need of one to die for them, to satisfy for guilt, and to bring in a righteousness. This he illustrates (Rom 5:7, Rom 5:8) as an unparalleled instance of love; herein God's thoughts and ways were above ours. Compare Joh 15:13…

5:6 At just the right time might mean that God sent Christ at the time appointed in history, or that our condition as utterly helpless was the right time for God to demonstrate his love by sending his Son on our behalf.