Each day is a learning experience, especially for those who want to grow into the likeness of Jesus Christ. From the beginning of time He gave perfect instructions that result in peace and contentment here on earth. To walk in His footsteps and learn to trust Him in all things leads to safety.
People refer to the old school many times to explain simpler ways of doing things that always worked. There are things like simple arithmetic that have always worked. Over the years people have come up with new math that will take up a whole chalkboard of figures to come to the same conclusion as the old simple arithmetic.
There is no older school than the simple instructions from God, Who has always existed. Those instructions still work today. His words remain forever.
2 Timothy 3:14-15
But as for you, continue in what you have learned and have become convinced of, because you know those from whom you learned it, and how from infancy you have known the Holy Scriptures, which are able to make you wise for salvation through faith in Christ Jesus.