“The strongest oak tree of the forest is not the one that is protected from the storm and hidden from the sun. It’s the one that stands in the open where it is compelled to struggle for its existence against the winds and rains and the scorching sun.”

Drifting.

Card XII : The Hanged Man http://www.sacred-texts.com/tarot/sot/sot23.htm
The Symbolism of the Tarot (1913)
Context: And then I saw a man in terrible suffering, hung by one leg, head downward, to a high tree. And I heard the voice: —
"Look! This is a man who saw Truth. Suffering awaits the man on earth, who finds the way to eternity and to the understanding of the Endless.
"He is still a man, but he already knows much of what is inaccessible even to Gods. And the incommensurableness of the small and the great in his soul constitutes his pain and his golgotha.
"In his own soul appears the gallows on which he hangs in suffering, feeling that he is indeed inverted.
"He chose this way himself.
"For this he went over a long road from trial to trial, from initiation to initiation, through failures and falls.
"And now he has found Truth and knows himself.
"He knows that it is he who stands before an altar with magic symbols, and reaches from earth to heaven; that he also walks on a dusty road under a scorching sun to a precipice where a crocodile awaits him; that he dwells with his mate in paradise under the shadow of a blessing genius; that he is chained to a black cube under the shadow of deceit; that he stands as a victor for a moment in an illusionary chariot drawn by sphinxes; and that with a lantern in bright sunshine, he seeks for Truth in a desert.
"Now he has found Her."

" Chiapas: The Southeast in Two Winds http://struggle.ws/mexico/ezln/marcos_se_2_wind.html" (August 1992)

Source: No Longer at Ease (1960), Chapter 10 (p. 95)

The Notebooks of Leonardo da Vinci (1883), XIX Philosophical Maxims. Morals. Polemics and Speculations.

some poetry lines of Friedrich, c. 1807-09; as cited by C. D. Eberlein in C. D. Friedrich Bekenntnisse, p 57; as quoted and translated by Linda Siegel in Caspar David Friedrich and the Age of German Romanticism, Boston Branden Press Publishers, 1978, p. 52
1794 - 1840

Song lyrics, Earth Moving (1989)

The Tall Office Building Artistically Considered (1896)
Context: Whether it be the sweeping eagle in his flight, or the open apple-blossom, the toiling work-horse, the blithe swan, the branching oak, the winding stream at its base, the drifting clouds, over all the coursing sun, form ever follows function, and this is the law. Where function does not change form does not change. The granite rocks, the ever brooding hills, remain for ages; the lightning lives, comes into shape, and dies in a twinkling.
It is the pervading law of all things organic and inorganic, of all things physical and metaphysical, of all things human and all things superhuman, of all true manifestations of the head, of the heart, of the soul, that the life is recognizable in its expression, that form ever follows function. This is the law.