Zechariah 4: 6: “This is the word of the LORD unto Zerubbabel, saying, Not by might, nor by power, but by my spirit, saith the LORD of hosts.”
I Corinthians 4: 20: “For the kingdom of God is not in word, but in power.”
I Thessalonians 1: 5: “For our gospel came not unto you in word only, but also in power, and in the Holy Ghost, and in much assurance; as ye know what manner of men we were among you for your sake.”
There is a well-known story about Smith Wigglesworth while he was riding in a passenger train. Wigglesworth was a British evangelist and faith healer in the early and mid 1900s. The train stopped at this station and this man got on board and walked into the train car that Smith Wigglesworth was sitting in. Smith was just sitting there—maybe he was reading something or maybe he was looking out of the window. The man walked near where Smith was sitting, looked at Smith and cried out, “You convict me of sin!” He then ran out of the car. Smith never said a word; it was the Power of the Holy Ghost that convicted that man of sin.