What? "Instinct in Scripture"? What does that mean? Sorry, but I don't understand you.
Also: when "scripture" is mentioned in the New Testament, the word refers to the Tanakh (תנ"ך), aka the "Jewish bible", which contains the Law, the Prophets, and other holy writings. The Christian canon of Scripture (the Bible as we know it) didn't exist until it was defined by the Catholic Church around AD 300. What did Christians live by during the three hundred or more years in which Scripture as we know it did not exist?
Answer: the Tradition of the Catholic Church, which not only defined Scripture for us but passes down to this day the oral teachings of the Church, which include such doctrines as the Trinity, the elevated nature of Our Lord's mother, and the infallibility of St. Peter and his successors the popes when teaching on matters of faith, morals, and Church discipline.
It is by that authority that the doctrine of Indulgences is taught, and it is that authority that Luther and all those rebels since him have betrayed.
Well, Pope Pius V, in 1567, agreed that the sale of indulgences was offensive to God and they have been outlwed since.