What would have happened if Satan had not entered the garden?
Had Satan not been permitted into the garden and sin not entered, the human race would have had no choice and would have been like robots. Instead, humans are created beings given a will to accept or reject God's offer of salvation.
Les explains that it was in the sovereign workings of God that man was left with an alternative; otherwise there would be no choice or exercise of the will. If Satan had not been permitted to come into the garden and sin had not entered, the human race would have been without choice and would have been like robots. But humans are not robots; they are created beings given a choice to reject or accept God's tremendous offer of salvation.