How do we know the inspiration of the Gospel of Luke is true?

The Gospel of Luke, like the other three gospels, is recognized as divinely inspired scripture. Luke claims in the opening verses that he has received his information from those who were eyewitnesses and ministers of the word, emphasizing that he wrote these things in an orderly fashion to provide a clear reflection of the teachings of Jesus. The validation of his work comes through the testimony of God, which is greater than that of men, as stated in 1 John 5:9. Thus, the Gospel of Luke is understood as infallibly inspired by the Holy Spirit, making it a trustworthy source for Christian doctrine.