Beware of false prophets, which come to you in sheep’s clothing, but inwardly they are ravening wolves. –Matthew 7:15 (KJV)

Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world. –1 John 4:1 (KJV)

Such are false apostles, deceitful workers, transforming themselves into the apostles of Christ. And no marvel; for Satan himself is transformed into an angel of light. Therefore it is no great thing if his ministers also be transformed as the ministers of righteousness; whose end shall be according to their works. –2 Corinthians 11:13-15 (KJV)

“Not everyone who says to Me, ‘Lord, Lord,’ shall enter the kingdom of heaven, but he who does the will of My Father in heaven. Many will say to Me in that day, ‘Lord, Lord, have we not prophesied in Your name, cast out demons in Your name, and done many wonders in Your name?’ And then I will declare to them, ‘I never knew you; depart from Me, you who practice lawlessness!’” –Matthew 7:21-23 (NKJV)

When Simon saw that the Spirit was given at the laying on of the apostles’ hands, he offered them money and said, “Give me also this ability so that everyone on whom I lay my hands may receive the Holy Spirit.” Peter answered: “May your money perish with you, because you thought you could buy the gift of God with money! You have no part or share in this ministry, because your heart is not right before God. Repent of this wickedness and pray to the Lord in the hope that he may forgive you for having such a thought in your heart. For I see that you are full of bitterness and captive to sin.” –Acts 8:18-23 (NIV)

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Thomas C. Oden, John Wesley’s Scriptural Christianity.

—. John Wesley’s Teachings. (perhaps Thomas C. Oden is represented by the Thomas the Tank Engine vision)

Harald Lindstrom, Wesley and Sanctification.

Kenneth J. Collins, Wesley on Salvation.

Daniel Jennings, ed. The Supernatural Occurrences of John Wesley.

Henry Rack, Reasonable Enthusiast, pp. 420-436.

Frank Billman, The Supernatural Thread in Methodism.

Robert Tuttle, Mysticism in the Wesleyan Tradition.

The Works of John Wesley (Baker Books, 3rd ed).