2 Timothy 1:9 says that God’s plan for salvation was determined before time began. Verse 10 says, “But has now been revealed by the appearing of our Savior Jesus Christ, who has abolished death and brought life and immortality to light through the gospel.”
The One Who spoke ‘Let there be light’ is Light. John 1:3-4 says, “All things were made through Him, and without Him nothing was made that was made. In Him was life, and the life was the light of men.”
Verse 9 says, “That was the true Light which gives light to every man coming into the world.” 2 Corinthians 4:6 says, “For it is the God who commanded light to shine out of darkness, who has shone in our hearts to give the light of the knowledge of the glory of God in the face of Jesus Christ.” The mystery remained in God’s heart until it was time for Jesus to be revealed.