Rabbi Yaron Reuven reveals a secret to timeless wisdom from Pirkei Avot. Rabbi Chanina ben Dosa says, the only wisdom that stands the test of time is wisdom preceded by Yirat Shamayim (Fear of the Almighty). Rabbeinu Yona says, if your Torah is purely intellectual, it won't last, it must be learning in order to do. Any wisdom purely for the sake of intellectual stimulation or to be popular, fades away at best.