Two trees are singled out from the rest to serve as “sacramental” signs and seals of the covenant. This should not surprise us since food and meals function this way in virtually every covenant in the Bible. But the important point here is that essential to every biblical covenant are these public, very physical memorials of the covenant. There is a sign of the covenant, something physical and tangible to remind God and Adam of the covenant: the two trees in the Garden.
