“These signs will accompany those who have believed: in my name they will cast out demons, they will speak with new tongues; they will pick up serpents, and if they drink any deadly poison, it will not hurt them; they will lay hands on the sick, and they will recover. So then, when the Lord Jesus had spoken to them, He was received up into heaven and sat down at the right hand of God. And they went out and preached everywhere, while the Lord worked with them, and confirmed the word by the signs that followed” (Mark 16:17-20)
The Lord commissioned his disciples to be spiritually powerful in ways the world would notice. Authority over demons, poisonous threats and miraculous healing where demonstrated after Jesus ascended and the Apostles began their ministry. Every believer has been given this authority that is manifested as they walk in faith and prayer. We need miracles from Heaven!