12以撒是自主妇人所生,就是从恩典所生的。他是新约信徒的表样。我们这些新约的信徒,都是从自主妇人生的,就是从神恩典生的。因此,以撒作为亚伯拉罕的后裔,预表基督(加三16),也预表所有新约的信徒(29)。基督是头,信徒是祂的身体。以撒不是从旧人凭肉体生的,乃是在复活里凭神的恩典生的。……创世记十七章事实上是说到新约,就是新遗命。神在新约里的经纶是全丰全足的。在新约里,我们得着一切。我们有基督的死割除我们的旧人,我们也借着基督的复活有了新的出生(李常受文集一九九一至一九九二年第四册,一三五至一三六页)。 12Isaac was born of the free woman, born of grace. He was a pattern of the New Testament believers. We, the New Testament believers, are all born of the free woman, the grace of God. Thus, Isaac as Abraham’s seed typifies both Christ (Gal. 3:16) and all the New Testament believers (v. 29). Christ is the Head, and the believers are His Body. Isaac was born not by the flesh of the old man but by God’s grace in resurrection. Genesis 17 actually covers the new covenant, the new testament. God’s economy in the New Testament is all-sufficient. In the New Testament we have everything. We have the death of Christ to cut off our old man, and we have the new birth through Christ’s resurrection. (CWWL, 1991-1992, vol. 4, “The History of God in His Union with Man,” pp. 100-101)