In order to enter this gate, Simply do not give rise to thinking. Only when we return to our before-thinking mind is it possible to eliminate the confrontation, hostility, fighting, and killing which are destroying the world. If your mind becomes clear like space then it is possible to attain the absolute world, then everything you see and hear will be the truth. Mountain is blue, water is flowing. Salt is salty.
Sugar is sweet.
When we perceive clearly that the absolute and truth worlds are not different but one with our true nature, then we attain correct life, which means attaining the correct situation, relationship and function. That is Zen. Zen is not just for Buddhists. Rather, it is a bright ray of hope to restore the humanity of our world, a compass pointing us back toward true world peace. The original Zen tradition disappeared in China a long time ago.