If God does exist, and if the Bible is inspired of God, and if Jesus is the Son of God, and if the Bible teaches that one must believe, repent, confess and be baptized in order to be saved, then one can know what to do to be saved from the wrath of God.
God does exist. Design demands a designer. The world abundantly exhibits design. Therefore, there is a Master Designer of the world (Psa. 19:1-4). Also, morality demands a moral law giver. Mankind has inborn morality. Therefore, there must be a Great Moral Giver (Rom. 1:32; 2:14, 15).
The Bible is inspired of God. It is beyond human ability for forty men who were separated by time (up to 1000 years) to foretell by 400 to 1400 years some 300 predictions all of which were precisely fulfilled (Deut. 18:20- 22).
Jesus is the Son of God. Jesus did many things which proved that He was the Son of God (John 20:30,31).
The Bible does teach that one must believe, repent, confess and be baptized in order to be saved. One must believe (1 Cor. 1:21), repent (Luke 13:3,5), confess (Rom. 10:9,10) and be baptized (Mark 16:16; 1 Pet. 3:21) in order to be saved.
With all the above being proven, one can know what one must do to be saved from the wrath of God.
Gary Henson