Rainer Maria Rilke said this quote
“ To retreat into oneself and meet nobody for hours on end—that is what one must be able to attain. To be alone, as one was alone as a child, when the grown-ups walked about involved in things which seemed great and important, because big people looked so busy and because one could comprehend nothing of their doings. And when one day one realises that their affairs are paltry, their professions benumbed and no longer connected with life, why not still like a child look upon them as something strange from without the depth of one's own world, regarding them from the immunity of one's own loneliness, which is itself work, position and profession? Why desire to exchange a child's wise incomprehension for self-defence and disdain? Incomprehension is loneliness, but self-defence and disdain are participation in that from which one is trying to separate oneself by these means. ”