Buddhism makes mind its foundation and no-gate its gate.
Now, how do you pass through this no-gate?
It is said that things coming in through the gate can never be your own treasures. What is gained from external circumstances will perish in the end.
However, such a saying is already raising waves when there is no wind. It is cutting unblemished skin.
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The opening of the preface to Gateless Gate, A 13th century text by Mumon Ekai, 1183-1260.
Watch your thoughts, they become your words.
watch your words, they become your actions.
watch your actions, they become your habits.
watch your habits, they become your character.
watch your character, it becomes your destiny.
β Lao Tzu
One thing I feel is important to share from my time practicing is that if you see anything out of the ordinary during meditation, the wisest course in zen practice is to ignore it.
Concentrate on the feeling of each precious moment rather than seeing something.
-Paraphrasing Roshi Kapleau