From revivalschool.com:
On one occasion, he recalled, “I was travelling to Cardiff in South Wales. I had been much in prayer on the journey. The carriage was full of people whom I knew to be unsaved, but as there was so much talking and joking I could not get in a word for my Master. As the train was nearing the station, I thought I would wash my hands… and as I returned to the carriage, a man jumped up and said, ‘Sir, you convince me of sin,’ and fell on his knees there and then. Soon the whole carriage of people were crying out the same way. They said, ‘Who are you? What are you? You convince us all of sin’…” (Stanley Frodsham, ‘Smith Wigglesworth, Apostle of Faith’, pg 80).
Smith Wigglesworth placed great emphasis on purity and holiness, like all true Revivalists. He said, “You must every day make higher ground. You must deny yourself to make progress with God. You must refuse everything that is not pure and holy. God wants you pure in heart. He wants you to have an intense desire after holiness… Two things will get you to leap out of yourselves into the promises of God today. One is purity, and the other is FAITH, which is kindled more and more BY PURITY.” (Pg 125). This one statement contains what is probably the key secret to Smith Wigglesworth’s outstanding success in God. And it is obviously a key that is well worth remembering for us also. Another point to remember is that Smith was very aware of the dangers of money, and guarded himself carefully against the possibility of covetousness entering in. He was truly beyond reproach in this area also.