Complex sentence: He describes Mankind as a finite being trapped within an incomprehensible infinity, thrust into being from non-being for a brief life only to go out again, with no explanation whatsoever of "Why?" or "What?" or "How?".
Split into simpler sentences: He describes Mankind as a finite being trapped within an incomprehensible infinity. Thrust into being from non-being for a brief life only to go out again, with no explanation whatsoever of "Why?" or "What?" or "How?".