“What if evil doesn't really exist? What if evil is something dreamed up by man, and there is nothing to struggle against except out own limitations? The constant battle between our will, our desires, and our choices?”

Foreword
The Denial of Death (1973)

Source: Discipleship (1937), The Disciple and Unbelievers, p. 185.

54
The Zürau Aphorisms (1917 - 1918)
Context: There is nothing besides a spiritual world; what we call the world of the senses is the Evil in the spiritual world, and what we call Evil is only the necessity of a moment in our eternal evolution.
One can disintegrate the world by means of very strong light. For weak eyes the world becomes solid, for still weaker eyes it seems to develop fists, for eyes weaker still it becomes shamefaced and smashes anyone who dares to gaze upon it.

Source: Adultery

Source: Arion and the Dolphin

Part III, Chapter III
Les voix du silence [Voices of Silence] (1951)

“Welt muss mehr denn je diese Botschaft hören,” Giessener Allgemeine Zeitung, Giessen, Germany, April 12, 2005.
Attributed

"¿No es lo mismo que suceda lo que deseamos, que desear lo que suceda? Lo que importa es que nuestra voluntad y los sucesos estén de acuerdo."
La otra aventura, 1968.