"One day He was teaching; and there were some . . . sitting there [in a house] . . . and the power of the Lord was present for Him to perform healing" (Lk 5:17). God had anointed Jesus "with the Holy Spirit and power" (Ac 10:38) and He went about "healing all" (:38). "You will receive power when the Holy Spirit has come upon you" (1:8). "He who raised Christ Jesus from the dead will also give life to your mortal bodies through His Spirit who dwells in you" (Ro 8:11).
Some men had carried a paralyzed man to the meeting to be healed, but it was too crowded, so they made an opening in the roof and lowered him which would have been risky. On TV there is a series where rescue vehicles recover wrecked trucks. There is a rotator truck where straps have to be strategically placed and other trucks' winching has to be exactly coordinated. The stretcher was lowered "into the middle of the crowd, in front of Jesus" (Lk 5:19). Jesus saw "their faith" (:20) and said "'your sins are forgiven'" (:20). He didn't say their faith had healed him but used forgiveness to demonstrate his authority. Also, he had essentially observed the faith of those who had helped the paralyzed man. Jesus said to him, "'I say to you, get up, and pick up your stretcher and go home'" (:24). "Immediately he got up . . . and went home glorifying God" (:25).
The gospel is "the power of God for salvation to every one who believes" (Ro 1:16) "written that you may believe" (Jn 20:31). It is "the word of truth" (Ja 5:18), "message of truth" (Eph 1:13) and "living and enduring word of God" (1Pe 1:23). "Your word is settled in heaven" (Ps 119:89) because "Jesus Christ is the same yesterday and today and forever" (Heb 13:8). "'For I, the Lord, do not change'" (Mal 3:6). "'He who believes in Me, the works that I do, he will do also" (Jn 14;12). "Their anointing will qualify them for a perpetual priesthood" (Ex 40:15). "He has made us to be a kingdom, priests to His God" (Rev 1:6). This was accomplished by Jesus' crucifixion and resurrection. It is a better covenant, which has been enacted on better promises" (Heb 8:6). Therefore "'pray and ask [and] believe that you have received them'" (Mk 11:24). But make sure your request is "united by faith" (Heb 4:2).