Parsha: Noah, "The Rainbow Covenant"

There are several approaches to the OT Brit found in the Keshet in Parshat Noah. (B'raishit: 8: 21-22)

1. The more "mystically" inclined will read that Hashem created the rainbow just to signify the Covenant. They will think the rainbow a brand new phenomena. 
2. The more "rationally" minded will think that while rainbows had long predated Noah. Hashem was only now investing the Rainbow with new meaning and new significance through the covenant.

As per Hashqafah #2 we create Holy artifacts by sanctifying them. For example, a mundane piece of gold is endowed with holiness when dedicated to the Sanctuary or the like. Humanity's role is therefore not just to  "complete" the existing creation, but to sanctify it as well.

Shalom,
RRW