Standards are different for all things, so the standard set by man is by no means the only 'certain' standard. If you mistake what is relative for something certain, you have strayed far from the ultimate truth.

Flow with whatever may happen and let your mind be free.

Love of colors bewilders the eye and it fails to see right. Love of harmonies bewitches the ear, and it loses its true hearing. Love of perfumes fills the head with dizziness. Love of flavors ruins the taste. Desires unsettle the heart until the original nature runs amok. These five are enemies of true life. Yet these are what men of discernment claim to live for. They are not what I live for. If this is life, then pigeons in a cage have found happiness!

Those who follow the Tao are of clear mind. They do not load their mind with anxieties and are flexible in their adjustment to external conditions.

Only fools imagine they are already awake. How clearly they understand everything! How easily they distinguish this deception from that reality!

The eye is a menace to clear sight, the ear is a menace to subtle hearing, the mind is a menace to wisdom, every organ of the senses is a menace to its own capacity.

A sage steers by the bright light of confusion and doubt.