This is the most important part of the process .No mountain will move itself unless there is somebody to speak to it.
Mathew 17:20
And Jesus said unto them,Because of your unbelief.For verily I say unto you,if ye have faith as a green of mustard seed,ye shall say unto this mountain.Remove hence to yonder place and it shall remove;and nothing shall be impossible unto you.
This verse is emphatic about 'saying', even if your faith is as small as mustard seed,if can speak to it,it has to move.The condition of a man's health does not outrightly declare the verdict on his life,it is his inability to wield the power of the spirit by speaking by revelation to that situation that do so but once he can address the situation ,then that mountain of such sickness will be removed.
Everything has intelligence,either a rock ,body, business,life or finances.If you can speak the revelation of the word to that situation continually ,it will hear and respond to you and pack it's load.Jesus spoke to the fig tree,water,dead bodies,sick bodies,bread & fish,storm etc.Lets see how He did these stuff.
Fig tree
Mark 11:13,20
13 And seeing a fig tree afar off having leaves,he came if haply he might find anything thereon and when he came to it ,he found nothing but leaves for the time of fig was not yet.
14. And jesus answered and said unto it,No man eat fruit of thee hereafter for ever .And his disciples heard it
20 And in the morning,as they passed by ,they saw the fig tree dried up from the roots
Water
John 2:8,10
And he said unto them,Draw out now,and bear unto the governor of the feast,And they bare it
And saith unto him,Every man at the beginning doth set first good wine; and when men have well drunk,then that which is worse .but thou hast kept the good wine until now.
Dead body
John 11:43-44
And when he this had spoken,he cried with a loud voice ,Lazarus,come forth
And he that was dead cameforth,bound hand and foot with grave clothes; and his face was bound about with a napkin.Jesus said unto them,loose him and let him go.
Sick body
Mark 9:25-26
When Jesus saw that the people came running together,he rebuked the foul spirit,saying unto him,Thou dumb and deaf spirit ,I charge thee,come out of him and enter no more into him.
And the spirit cried,and rent him sore ,and came out of him; and he was as one dead ; insomuch that many said He is dead.
Seeing the same pattern in how the Lord Jesus addressed these situations by speaking to them. He spoke to water and it turned to wine ,He spoke to the fig tree and it dried from the root,He spoke to Lazarus' dead body and he came alive ,lastly Here He spoke to a dumb and deaf spirit and rebuked that spirit and the boy was delivered.
When we speak by revelation and with faith,it carries weight.Lets understand that every sickness has a spirit; there is a spirit of cancer,there is a spirit of tuberculosis,there is a spirit of migraine,there is a spirit of fever ,every sickness has spirit,mention the spirit of that sickness.
Jesus got to Peter's house and saw the mother-in-law held down by fever ,He rebuked the spirit of fever and the woman rose up immediately and cooked for them(Mathew 8:14).You speaking to that sickness or situation might not have an instant impact but as you continue to speaking ,there is a performance working already in the spirit and all along it will play out in reality , believe your words triggers great wonders in the spirit ,so continue until you see the end of it.