Even when you are clearly correct and others are mistaken, it is harmful to argue and defeat them. On the other hand, if you admit fault when you are… - Dōgen

All the Buddhas, whether in this world or in other quarters, in the western heaven (India) or the eastern earth (China), equally held the Buddha-seal and altogether enjoyed the supreme style. They were fully devoted to this total sitting (shikantaza) and were totally installed in this unmoved state. Even though there are a thousand differences and a million nuances, they engaged devotedly in practicing zazen and realizing the Way.

Therefore, you must stop comprehending the conduct of investigating words and chasing discourses. You must learn to step backward to turn your light around to reflect on yourself. Mind and body will naturally fall away and your original face will manifest itself. If you wish to attain suchness, devote yourself to suchness at once.

If there are fish that would swim or birds that would fly only after investigating the entire ocean or sky, they would find neither path nor place.