First witness: Spirit- this is the life inside you that causes you to live also a part of God in you. It serves two purpose, (1) for you to live but does not intervene with your choices. (2) Kinda like a black box that records who you are from conception to death. This can be a witness for you or against you afterlife. The spirit within you knows who you are better than you know yourself (1 Corinthians 2:11).
Second witness: Water- 1 Peter 3:21– symbolism to a clean and pure conscience towards God, this too will be look upon whether you pass or not.
Third witness: Blood- This symbolise the sacrifice you have made in your faith, your works and sufferings you endure if there are any.
At least 2 of these must be met to pass the judgement (Heb 9:27).
Click here to read the life within you.