The main theme of the I Ching is that everything is in a process of continuous change, rising and falling in a progressive evolutionary advancement.

The "Tao of I" also discloses that when situations proceed beyond their extremes they alternate to their opposites:
      In a favorable time and situation never neglect the unfavorable potential.
      In an unfavorable time and situation never act abruptly and blindly.
      And in adverse circumstances never become depressed and despair.

"When the darkness grew darker and darker, the dawn grew closer and closer."

Alfred Huang
Recounting his long imprisonment during the Cultural Revolution

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Also of interest:
Oral Tradition of the Dunne-za
Faith In Our Dreams - Thoreau
Naraya Poetry-Song of the Wind River Shoshone Ghost Dance
Havasupai Farewell Song
The Threefold Miracle
Scroll of Timothy
Worship
Webs of Significance
Deeds
Hanukah - an interpretation
Satchel Paige
Experience
Speaking With God
Right Brain