Whatever arises — taste, touch, thinking, sight, smell, sounds — just receive. This is basically shikantaza: Just Precisely This. The idea is to keep it very, very simple. You might immediately start to speculate. If you do, just watch the speculation. Correct nothing. You can just receive your thoughts, without complicating. Sit down symmetrically in front of the wall and whatever shows up, that’s it. If you completely, throughly and specifically receive, then you won’t know exactly what that is. From the point of view of wisdom, you know what everything is.

https://youtu.be/wtxb9NJEOis