One of the old criticisms of Christianity is how “old fashioned” it is. Scoffers and mockers will say that “following the Bible is passe; it is behind the times; it is regressive.”
Nonsense. The Bible is timeless. It is a very old book, but old doesn’t mean out of style.
Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle.
2 Thessalonians 2:15
Paul’s advice to the Thessalonian brethren was to hold to the old paths. To stick with the tried and true methods of faithfulness. The context of his remarks here had to do with false teaching that was soon to start popping up. It would be the “new” and “en vogue” doctrine that would lead souls away from God.
There’s a real allure of things that are “new,” and while new isn’t necessarily bad, it is inherently untested and unproven. What is proven true and right and good and holy is the Word of God.
It’s old, but it’s not out of style. It’s just as valuable now as it was In The Beginning.