VII. Modern Man and His World Conception
Insofar as man considers himself within the world of natural things and events, he will find it impossible to escape the conclusions of this theory of relativity. But if he does not want to lose himself in mere relativities, in what may be called an impotence of his inner life, if he wants to experience his own entity, he must not seek what is “substantial in itself' in the realm of nature but in transcending nature, in the realm of the spirit.
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ENAP1973