Sorry, I said Jesus and I meant Paul...kids were talking to me...<quoted text>
Good point. But scriptures in this context meant the old testament letters, as when this was written, the NT books had not all be written and were not collected together for a further c.300 years.
Also note that St Paul also recommends preaching and teaching. In the early church this would have likely be the more common method as so few people could read and write, and written scriptures were so rare. This is why the great commission in its various forms in the gospels is a command to preach and teach, rather than to read or write.
Timothy, in order to be an effective watchman of the Lord's, was to constantly work at keeping the DOCTRINE of Jesus Christ free from spot or reproach.