Highest good is like water. Because water excels in benefiting the myriad creatures without contending with them and settles where none would like to be, it comes closest to the way.
Peacefulness is an inner sense of calm - it comes from becoming still - in order to reflect and meditate on our inner wisdom and receive answers. A peaceful heart is one that is free from worry and rouble. It's becoming quiet so we can look at things quietly so we can more clearly understand them and thus come up with creative solutions. It is learning to live in the present. Freedom from desire leads to inner peace.
To realize that our knowledge is ignorance, This is a noble insight. To regard our ignorance as knowledge, This is mental sickness. Only when we are sick of the sickness Shall we cease to be sick. The Sage is not sick, being sick of sickness; This is the secret of health.
Express yourself completely, then keep quiet. Be like the forces of nature: when it blows, there is only wind; when it rains, there is only rain; when the clouds pass, the sun shines through. If you open yourself to the Tao, you are at one with the Tao and you can embody it completely. If you open yourself to insight, you are at one with insight and you can use it completely. If you open yourself to loss, you are at one with loss and you can accept it completely. Open yourself to the Tao, then trust your natural responses; and everything will fall into place.
Things flourish, then each returns to its root. Returning to the root is called stillness: Stillness is called return to life, return to life is called the constant; knowing the constant is called enlightenment.