We think of the New Testament when we teach, but that was in the process of being written - example is this very letter. 2 Timothy 3:15, Paul's praise for Timothy's knowing scripture, for having them taught to him from childhood, had to do with what we think of as the Old Testament.
Yet, from these he was able "to be wise unto salvation through faith which is in Jesus Christ."
Could we witness using such scripture? Could we take the Holy Scriptures Timothy knew and offer salvation through faith in Jesus? Try working up an outline showing how you would witness using only scriptures before the birth of Christ. Where would you begin?
I would appreciate your comments, please. May God bless your reading of His word!