Book XVII 12
1 The Master said, ‘He who puts on an appearance of stern firmness, while inwardly he is weak, is like one of the small, mean people;— yea, is he not like the thief who breaks through, or climbs over, a wall?’
Try “Sefer Yetzirah”, “Golden Dawn”, “kundalini”, “Marie Laveau” or “Corpus Hermeticum”.