Therefore God also has highly exalted Him (Jesus) and given Him the name which is above every name, that at the name of Jesus every knee should bow, of those in heaven, and of those on earth, and of those under the earth, and that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father.
We believers are so used to saying “in Jesus’ name” at the end of every prayer that the phrase has lost much of it’s meaning. But as cliched as it has become, there is real power and authority in the name of our Lord.
Most assuredly, I say to you, whatever you ask the Father in My name He will give you. Until now you have asked nothing in My name. Ask, and you will receive, that your joy may be full.
Our prayers to God are made more effective when we use the name of His beloved Son. In fact, it is implied in the same passage that the disciples did not receive the full measure of joy because they did not ask in His name.
And these signs will follow those who believe: In My name they will cast out demons; they will speak with new tongues; 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.
We cast out demons, heal the sick and perform miracles by the power of the Holy Spirit, and Jesus said it will also be done in His name.
And it shall come to pass
That whoever calls on the name of the Lord
Shall be saved.
While the context of this verse is about salvation (see also Romans 10:13), I believe it also applies to those who call on the name of the Lord for deliverance in real life situations.
(By the way, I do not believe in the nonsense that there is power only in His Hebrew name. After all, God is the creator of languages.)