Should you desire the great tranquility prepare to sweat white beads.
What is the sound of one hand?
Not knowing how near the truth is, we seek it far away.
Underlying great doubt there is great satori, where there is thorough questioning there will be thoroughgoing experience of awakening.
Contemplation within activity is a million times better than contemplation within stillness.
At the bottom of great doubt lies great awakening. If you doubt fully, you will awaken fully.