A good calculator does not need artificial aids.
A man is born gentle and weak. At death, he is hard and stiff. Green plants are tender and filled with sap. At death, they are withered and dry. Therefore, the stiff and unbending is the disciple of death, and the gentle and yielding is the disciple of life.
Be empty. Be still. Just watch everything come and go. This is the way of Nature.
The most able seems clumsy.
What's the difference between yes and no?
The words of truth are always paradoxical.