15 And He said to them, “Go into all the world and preach the gospel to every creature. 16 He who believes and is baptized will be saved; but he who does not believe will be condemned. 17 And these signs will follow those who believe: In My name they will cast out demons; they will speak with new tongues; 18 they will take up serpents; and if they drink anything deadly, it will by no means hurt them; they will lay hands on the sick, and they will recover.”
Many people want the signs. They want to see miracles and healings worked through them or they want to see a healing in their own life, but they forget that there are two criteria to be met before we see that manifested:
1) You must "Go... and preach the gospel" (v. 15)
2) You must "believe" (v. 17)
If we don't see the supernatural daily then we need to check our lives by these two criteria.
1) Are you adhering to the call to preach the Gospel?
This does not mean that you have to quit your day job and start out in full-time ministry necessarily. If God has called you to do that then you'd better do it, but that's not what this verse is about. In Acts, Luke writes that Jesus told the disciples;
...you shall be witnesses to Me... (Acts 1:8)
A witness is simply someone who tells what they have experienced. If you are in a murder trial and a witness is called up they simply state that what they saw, heard, smelled, or felt. They are not even supposed to make any assumptions in regard to their experience but simply state the experience.
Jesus told His disciples to be witnesses of Him, of their experiences with Him.
We are to do the same!
What's your experience with Jesus? Have you talked with Him? Have you experienced His deliverance in your life? Healing? Comfort? Whatever you have experienced with Jesus is what He has asked you to share with those who don't know Him. Just be sure your experience matches up with the Word.
If you have not experienced Him then you need to!
Go to my page What is the Gospel to learn how to experience Him.
2) Do you truly believe?
Do you truly believe that the supernatural will happen around you? The Bible makes it clear that the supernatural requires faith. If you want to see healing then you need to believe in hearing, if you want to see devils cast out then you must believe in your authority over the devils.
If you do not believe then chances are the miracles won't be present in your ministry.
Do you believe that God still heals today?
Do you believe in your authority over the enemy?
Do you believe in the manifested power of God?
If not then you need to get in the Word!
The Word of God is where we build our faith for the supernatural. Jesus tells us that we can do the same miracles He did, and even greater miracles! (John 14:12)
Read the Word, meditate on it, listen to it, do whatever it takes to get the Word in you!
Meditate on John 14:12 until you believe it for your own life. Then study the Gospels and see all the miracles that Jesus did. That is what should be following your life and ministry as you preach the Gospel!