Sincere question: why should you not accept it?<p>&gt;Any person capable of angering you becomes your master; he can anger you only when you permit yourself to be disturbed by him.<p>-Epictetus<p>To answer your question, we should accept it because that is   the way reality is fundamentally. Go ahead and try to eternally fight to erase all darkness so that there is only light. Spoiler alert: it&#x27;s impossible. If there were no darkness there would be no such thing as light because light implies the presence of darkness and darkness implies light.