The Bible emphatically condemns the use of tradition as a source of authority because whenever tradition is set up alongside of Scripture, it eventually competes for the greater position and replaces it. It then is used to reinterpret Scripture.
2 Timothy 3:16-17 .......All Scripture is given by inspiration of God and is profitable for doctrine, for reproof, for correction, for instruction in righteousness, that the man of God may be complete, thoroughly equipped for every good work.
Suffice to say....Complete means just that, nothing else is needed to be function and mature in ones relationship to God except a willing heart and taking the time to read and study.
We are warned ..... “not to go beyond what is written,”... 1 Cor.4:6.
Paul taught Timothy through words Timothy heard, not solely through writings.