Luke, referred to as 'the beloved physician', likely did not himself see the things that Jesus did, or personally hear what he said, nevertheless was very typically meticulous in writing down the knowledge which he had obtained from those who were eyewitnesses of Jesus life and ministry. Writing therefore at the beginning of his Gospel - 'of those things most surely believed amongst us' - he was able to confirm their accuracy and reliability, by stating to Theophilus the purpose of this remarkable work - 'That thou mightest know the certainty of those things, wherein thou hast been instructed.' So we too may believe the Bible, as being truthful and without error, therefore being 'A Gospel of Substance Not Myth.'