Study the ancient peoples and their beliefs. Read the myths of creation. Study ancient Gods and Goddesses, prophecies, astral travel, near death experiences. Read the Christian Bible, Mormon Bible, the Jewish Kabbalah, read about Zoroaster, Muhammed, Kali, Lao Tse, Confucius, Buddha. In other words, study, study, study.
Wisdom is hard-won and takes many years to gain.
Those of us in the Craft have enormous respect for the CRO NES amongst us. True wisdom takes self-control as well as learning, and it takes a good knowledge of psychology and ethics to apply what you have learned with harm to none.