How to handle the teacher's teaching?

十年之内，对老师的东西要坚信不疑，一字不能差。
十年之后，要对老师的东西全部重新确认。一字不漏。

For the first 10 years, believe everything the teacher says without any doubt, with no changes to any word.
Beyond the first 10 years, verify everything the teacher says without missing any word.