Only one way
The old man nature cannot partake of the kingdom of God. The way back into the Tree of Life is via angelic beings guarding the way with flaming swords swirling in every direction.
We can also rest assured the primary preposition dia is the glorious road of being saved in, through, with, and by means of fire.
Note: saved
https://biblehub.com/1_corinthians/3-15.htm