One must believe that Jesus did what He said He did. By His stripes/wounds we WERE healed. It’s takes faith to bring what is to pass. Faith without any unbelief.
1 Peter 2:24 “He himself bore our sins in his body on the tree, so that we might die to sins and live for righteousness; by His wounds you have been healed.”
Isiah 53:5 “But He was wounded for our transgressions, He was bruised for our iniquities: the chastisement of our peace was upon Him; and with His stripes we are healed.”
Mark 10:52 Go,” said Jesus, “your faith has healed you.” Immediately he received his sight and followed Jesus along the road.
Mark 9:24 “Immediately the boy’s father exclaimed, “I do believe; help me overcome my unbelief!”
And this student believed and it came to pass. He heard The Word and OBEYED IT!
Matt 10:8 “Heal the sick, raise the dead, cleanse those who have leprosy, drive out demons. Freely you have received, freely give.