God intends to bring about a permanent physical separation of light from darkness. Light weight and light bearing are synonyms, like dark and heavy are. In general heavier, denser materials are darker.
Physical Separation
Malachi 3:10 vs. Luke 4:12
We presented atheist science trolls (ASTs) with a way to get the proof of God that they demand. We put it in terms of a testable hypothesis for the existence of God. It's Hypothesis 11, based on Malachi 3:10.
February 9th
In pondering the physics of creation we have come to understand that the earth is part of the ongoing process of the permanent physical separation of light from darkness. The process is not complete. Yet.