Say this with me:

The members and parts of my body are of Christ (1Corinth6:15). I refuse to be sick. I don't allow sickness, depression, pain and infirmities to rule over my life.
My body has been bought at a great price by Jesus Christ and it belongs to Him (1Cor6:20)...

I'm a member of Christ's flesh, body and bones (Eph 5:30), Satan has no right to inflict sickness into it. Sickness is the result of Adam's sin and it comes from Satan. I don't belong to Satan's Kingdom ANYMORE but I've transferred into Christ's kingdom (Col1:13)...

I live in that kingdom. There's no sickness there.