Yeah but where does spiritual hearing with understanding come from ?
In Acts 2 Peter preached a message to the people that Jesus Christ is both Lord and Christ (the Messiah).
Peter charged them, "God has made that same Jesus whom you have crucified both Lord and Christ."
When they heard this "they were pricked to the heart" and asked "what shall we do?"
How were they pricked to the heart?
Heb. 4:12
"For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart."
They heard the Gospel (the Word of God) from Peter and by the power of the Holy Spirit they were convicted (pricked to the heart), but they didn't know what to do (the depravity of man).
Peter told them what to do, repent and be baptized, and the Scripture says, "then they that gladly received his word were baptized."
They heard the Word, the Holy Spirit convicted of sin, and they chose to believe (receiving his word).