Yet, having acted in faith, and having received offspring as a tangible evidence of the promise at work, he, like his father, acts in unfaith (26:7) immediately following the virtual repetition of the full promise made to Abraham (26:3 f.): he, too, attempts to insure his own safety, his own security. (religion-online.org)
People like Esau even though blessed by God miss out on the full promises because they never repent. (redeeminggod.com)
Intact mitochondrial DNA sequences have been reported for Neanderthals and a number of extinct ice - age mammals, but the full promise of fossil DNA has yet to be realised. (newscientist.com)