Crisis of action

I tend to be a patient person, although that seems to be waning as I get older, but, I find myself at a loss recently when struggling with an issue. At the end of Mark 16 are these verses:

14 Later Jesus appeared to the Eleven as they were eating; he rebuked them for their lack of faith and their stubborn refusal to believe those who had seen him after he had risen.

15 He said to them, "Go into all the world and preach the good news to all creation. 16 Whoever believes and is baptized will be saved, but whoever does not believe will be condemned. 17 And these signs will accompany those who believe: In my name they will drive out demons; they will speak in new tongues; 18 they will pick up snakes with their hands; and when they drink deadly poison, it will not hurt them at all; they will place their hands on sick people, and they will get well."

19 After the Lord Jesus had spoken to them, he was taken up into heaven and he sat at the right hand of God. 20 Then the disciples went out and preached everywhere, and the Lord worked with them and confirmed his word by the signs that accompanied it.

Now, I can easily dismiss things on lots of grounds. For instance, I can read this and say these "signs" were something the apostles were demonstrating, but, it's certainly not something I should feel expected to do. But, when I read verse 20, it says disciples, not apostles. So, that one goes out the window.

So, the reasoning goes, if disciples of Christ are confirmed by the signs that accompanied his word, what am I to conclude from my life? I see two possibilities: 1) the Gospel is wrong and these signs are not necessary to confirm the Lord working with me, or 2) I am not doing what the Lord said. Since I believe the Bible, I will have to go with option 2: I am not doing what the Lord said. And, it saddens and angers me.

Lord, help me to know what to do. Teach me how to go into the world and preach the good news. Help me understand what you really want. And, if it is this simple (which I think it is), make me a preacher and teacher of the good news in the fullness of your love, power and Holy Spirit.