Knowing and believing are not the same thing.
Someone can come to me and tell me they saw a bass the size of a beagle, I take their word for it and believe them and go to the pond where they claimed it was, but there is no way for me to know they are telling me the truth, I just have faith.
Just like I would have to have faith they are telling me the truth about the large fish, I would have to have faith of the testimony and stories in the Bible being fact?
I do believe the Bible is true, but can I know for sure? Or can nobody know as long as they have not met the Lord.
I see some interesting answers. To believe you need faith. Faith comes by hearing and hearing by the word of God. That word is rhema in the Greek the "spoken word of god" So you can't get by on someone else's faith you have to have your own personal experience with God. Part of this hearing are events that convince you.
1 Corinthians 2:4-5 (ESV)
4 and my speech and my message were not in plausible words of wisdom, but in
demonstration of the Spirit and of power,
5 so that your faith might not rest in the wisdom of men but in the
power of God.
Romans 15:18-19 (ESV)
18 For I will not venture to speak of anything except what Christ has accomplished through me to bring the Gentiles to obedience—by word and deed, 19 by the
power of signs and wonders, by the power of the Spirit of God—so that from Jerusalem and all the way around to Illyricum I have fulfilled the ministry of the gospel of Christ;
Acts 1:8 (ESV)
8 But you will receive
power when the Holy Spirit has come upon you, and you will be my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth.”
You need to undeniable see the power of God. The woman at the well saw it through prophecy, others saw various signs and wonders. Most often it is a conviction of the Holy Spirit for sin and God speaking to your heart for a need of Jesus. Faith is often given where the word of God is preached. Love too is the motivator from God to us, or from a believer who uses the gifts of the spirit.
I myself accepted Jesus as a kid at a vacation bible school. But I never saw the power and really did nothing but turn from God, thinking he must just be a construct used by elites to maintain power for themselves. When I finally saw the Spirit of God doing something tangible, I was transformed. The Holy Spirit does not stop either, it continues to show stuff all the time. From revelations in the word, to guiding my path, to every once in a awhile something supernatural. The fruit of the Spirit too is supernatural. Many think a "power church" must always have miracles. Hopefully yes, but when I first encountered the power of God it was by the amazing love that I felt when I went to certain church. Just be careful, as some fake the Spirit of God with weird doctrine or things done in the name of God that are really from the flesh or even demonic. Ask God though, he is not going to send you a stone if you ask for bread. I pray you can take it to the next level that your faith would rest on the power of God. I could share dozens of examples of seeing the power of God at work.
I will say too that any Christian wishing to experience more of the power of God, just needs to partner with God in seriously trying to help and love someone else. Praying, witnessing, giving and reaching out beyond your natural abilities to meet a need.
Some too might think I am prideful here. Perhaps, but a Christian can do nothing on their own. Besides because I have been backslid before, I know too well the difference between cold, warm, and hot. God bless!