"But though He had done so many miracles before them, yet they believed not on Him" John XII:37

[Canterbury cathedral]

"We err greatly if we suppose that seeing wonderful things will ever convert souls. Thousands live and die in this delusion. They fancy if they saw some miraculous sight, or witnessed some supernatural exercise of Divine grace, they would lay aside their doubts, and at once become decided Christians. It is a total mistake. Nothing short of a new heart and a new nature implanted in us by the Holy Ghost, will ever make us real disciples of Christ. Without this, a miracle might raise within us a little temporary excitement; but, the novelty once gone, we should find ourselves just as cold and unbelieving as the Jews.

The prevalence of unbelief and indifference in the present day ought not to surprise us. It is just one of the evidences of that mighty foundation-doctrine, the total corruption of man. ...If even the hearers of Christ did not believe, how much more should we expect to find unbelief among the hearers of His ministers! Let the truth be spoken and confessed. Man's obstinate unbelief is one among many indirect proofs that the Bible is true. The clearest prophecy in Isaiah begins with the solemn question, "Who hath believed?" (Isai. liii. 1.)" -Bishop John Charles Ryle,

The Jews thought they were children of the Most High God. Yet when God, through Jesus, raises Lazarus from being dead for 4 days, the Jews not only want to kill Jesus, they want to kill Lazarus!
Unbelief should not surprise us as the Bishop here says. In one sense it should bewilder us, but not surprise us, because of what the Scriptures teach. The great surprise should be that I believe at all. That is beyond belief: That a holy and righteous, wonderful God and Savior, would grant me to repent and believe. And from this grace of salavtion of my soul, my heart is now His, and my first love is Christ. An immature and fickle love at times, but a love embedded in my heart by the Holy Spirit, the eternal third person of the blessed Trinty, who is God's pledge to me that my salvation is eternally settled (2 Corinthians 1:22; Ephesians 1:13). And so I have peace with God's assured promise, which can not be broken, nor annuled.