I Was Only Keeping a Diary in the Interception Sect, Yet I Became a Sage

Tian Chenzi woke up one morning and found he had transmigrated into the primordial world. He had become a divine being, formed from the first ray of starlight in the East Sea when heaven and earth first opened. As a naturally divine being with a decent birth, Tian Chenzi had hoped to become Laozi's disciple, or, failing that, to join the Chan Sect. Unfortunately, he had been enlightened by Tongtian, who was preaching in the East Sea. Thinking of the Interception Sect's tragic fate in the future, Tian Chenzi had not wanted to join it. But he lacked the courage to refuse a Sage, so he reluctantly became an outer-sect registered disciple of the Interception Sect. Just as he was pondering how to escape the sect's destruction in the future, a diary System descended from the heavens. All he had to do was write in his diary every day to grow stronger. Tian Chenzi figured the Investiture of the Gods calamity was still a long way off, so he would keep a low profile, secretly writing in his diary as he grew stronger. But things gradually took an unexpected turn. During the Lich calamity, Tongtian seemed to know the future and became the greatest winner in the destruction of the demon clan's Heavenly Court. Afterward, he sheltered humanity, seized the Kongtong Seal, and plotted the appointment of the Three Sovereigns and Five Emperors! Was this really the same Tongtian who had been manipulated by Yuanshi and Laozi? Just as Tian Chenzi was wondering about this, he found himself promoted all the way to the Interception Sect's deputy leader and future successor, even though he had been planning to leave. What was he supposed to do now?