Are the Gospels included in the Old Testament scriptures that were written for our learning?
Yes, the Gospels can also be included among the things written aforetime for our learning, because they are hooked to the Old Testament economy. Paul states all these things were written before time for our learning, not for salvation or doctrine.
Les explains from Romans 15:4 that whatsoever things were written aforetime, all the things written in the Old Testament, were written for our learning, not for salvation or doctrine. He says you can also include the Gospels because they are all hooked to the Old Testament economy. He illustrates with a child who cannot jump into university calculus without first learning arithmetic, showing that believers need foundational understanding. The learning process is slow, requiring patience, comfort, and repetition, moving on to deeper things.
For whatsoever things were written aforetime were written for our learning, that we through patience and comfort of the scriptures might have hope.