According to the Bible, we cannot trust our feelings to know whether or not we are saved. Also, consider the apostle Paul. He lived before God in all good conscience but admits he did it ignorantly in unbelief. Just because his conscience did not tell him he was wrong in persecuting Christians does not mean that he was right with God while doing so.
||There is a way that seems right to a man, but its end is the way of death.
||He who trusts in his own heart is a fool, But whoever walks wisely will be
|1 Timothy 1:12-14
||And I thank Christ Jesus our Lord who has enabled me, because He counted me
faithful, putting me into the ministry, although I was formerly a
blasphemer, a persecutor, and an insolent man; but I obtained mercy because I
did it ignorantly in unbelief. And the grace of our Lord was
exceedingly abundant, with faith and love which are in Christ Jesus.
||Then Paul, looking earnestly at the council, said, "Men and brethren, I have
lived in all good conscience before God until this day."
||You see then that a man is justified by works, and not by faith only.
||So then faith comes by hearing, and hearing by the word of God.
|1 John 5:13
||These things I have written to you who believe in the name of the Son of God,
that you may know that you have eternal life, and that you may continue to
believe in the name of the Son of God.