The Fourth Pentacle of Mercury is one of many Seals attributed to King Solomon, 2nd son of David and 3rd king of Israel, and master magician. This seal is said to help "acquire the understanding and knowledge of all things created, and to seek out and penetrate into hidden things." These seals were lifted from the "Greater Key of Solomon", a foundational grimoire of Western Esotericism that contains influences of Judaic mysticism/Kabbalah, Roman astrology and Hermetic alchemy. Every one knoweth in the present day that from time immemorial Solomon possessed knowledge inspired by the wise teachings of an angel, to which he appeared so submissive and obedient, that in addition to the gift of wisdom, which he demanded, he obtained with profusion all the other virtues; which happened in order that knowledge worthy of eternal preservation might not be buried with his body. [The Greater Key of Solomon (1999), Liddell & Mathers]