Practise the thinking. Keep the judgement.
温故知新 — Learning from the old to understand the new
おんこちしん
onko chishin
Meaning
Learning from the old to understand the new
Original example
温故知新の姿勢で伝統を学びます。
I study tradition with a view to finding new understanding in the old.
Cultural context and nuance
An expression from the Chinese Confucian tradition, used in Japanese. Its history is not exclusively Japanese.