Eternity is the Absolute present.
The waters are in motion, but the moon retains its serenity.
Zen has no business with ideas.
Unless we agree to suffer we cannot be free from suffering.
We have two eyes to see two sides of things, but there must be a third eye which will see everything at the same time and yet not see anything. That is to understand Zen.
Dhyana is retaining one's tranquil state of mind in any circumstance, unfavorable as well as favorable, and not being disturbed or frustrated even when adverse conditions present themselves one after another.