Question:
Read John 14:12. Some people say that when we are saved we should be able to do these great miracles, and if we can’t then it’s our fault.

Answer:
These great works mentioned in this verse are referring to eternal works, not works we do here on earth. Once Christianity was established, these gifts of miracles were not needed (2 Timothy 4:20, Philippians 2:24-30). Tongues were only used for those who were unsaved (1 Corinthians 14:22). Speaking in tongues does not prove that we are moved by the Spirit, but speaking in tongues or speaking in other languages were used to get God’s message to those who cannot understand the language normally spoken (Acts 2:1-14).