After Jesus died, and after the Roman centurion in charge of the crucifixion confessed the righteousness of Jesus, Luke noted this about the people,
“And the whole crowd who came together to that sight, seeing what had been done, beat their breasts and returned” (Luke 23:48).
The manner in which Jesus died, affected the people, and they beat their breasts in agony that they may have killed a righteous man, perhaps even the Son of God.
Then many days later Peter preached his famous Pentecost sermon and the hearts of the people were ready, and about three thousand people turned to the Lord.
God does not rush things, but He convicts us of sin, and lets the guilt do its work, and when we are ready He sends someone to help.