The history of Joseph, who saved his family and all of Egypt from death due to starvation, foreshadows the Messiah to come, who has the power to save us, whether Jew or Gentile, from eternal damnation.
The words “God is witness between you and me” should not be taken lightly. God is the omniscient witness. He is ever-present and sees all—all thoughts, all actions, all intent, and all desire. Even the darkness is pure light to Him. Nothing is hidden from His holy eyes, and we should therefore live in the light of such a fearful truth.