Mo Wen discovered that practising the Divine Pill Sect's technique was all sorts of unsatisfactory. His cultivation was always stagnant. Practising the Celestial Scripture: Sun and Moon on the other hand was exceptionally fast. He could see improvements everyday.
Later, he would know that the Cultivation Practice Method could only see achievement if practised from young. People like him who started practising it later in life, the road to cultivation was a dead end. No matter how much effort he put in, it was almost impossible to achieve anything.
Disappointed, Mo Wen had no choice but to forsake the Divine Pill Sect's Cultivation Practice Method, picking back up his own Celestial Scripture: Sun and Moon.
For the next three years, Mo Wen stayed with the Divine Pill Sect. His identity was a mere registered disciple.
But just like that, he still had a lot of benefits. As a registered disciple, he also had the opportunity to obtain many miraculous pills.