But Jesus, knowing their thoughts, said, “Why do you think evil in your hearts? For which is easier, to say, ‘Your sins are forgiven you,’ or to say, ‘Arise and walk’? But that you may know that the Son of Man has power on earth to forgive sins”—then He said to the paralytic, “Arise, take up your bed, and go to your house.”
7And he arose and departed to his house.
8Now when the multitudes saw it, they marveled and glorified God, who had given such power to men.
The origin of our words matter.
If we are sent by God to speak a word of healing over someone then that person will be healed. It is not our words that healed him, but the words we received from our Father to speak.
This is only true within those who are led by the Spirit of God. Fakers cite diverse scriptures claiming that "Because said thus and such we can proclaim it as true". That's not how the Word works. Knowing what the Spirit is saying in the moment is required. Otherwise, as some have pointed out, the fakers should be goaded into speaking a universe into existence.
"...when the Spirit of truth comes, He will guide you into all truth. For He will not speak on His own, but He will speak what He hears, and He will declare to you what is to come. He will glorify Me by taking from what is Mine and disclosing it to you. Everything that belongs to the Father is Mine. That is why I said that the Spirit will take from what is Mine and disclose it to you."
The order is The Father to the Lord to the Spirit to one led by the Spirit.
Peter understood this, as did the other disciples. He spoke what was given to him and a man was healed.
"Then Peter said, “Silver or gold I do not have, but what I do have I give you. In the name of Jesus Christ of Nazareth, walk.” 7 Taking him by the right hand, he helped him up, and instantly the man’s feet and ankles became strong."
In conclusion: if our words have any power it because they originated from the Lord and were given to us from the Spirit. If our words originated from us they have no power from God.
"But I tell you that men will give an account on the day of judgment for every careless word they have spoken. For by your words you will be acquitted, and by your words you will be condemned.”
There are many "preachers" today who are storing up shelves of condemnation for themselves.