A light in a cage
In Buddhism, the hyperactive stream of thoughts, memories, and images is dubbed the 'Monkey Mind'. If one can master it, one begins to extricate themselves from the grasp of Samsara.
In the west, although mostly suppressed by a certain dominant religion-or two, the discipline of quieting the mind has a long history. I will choose but one example, The Gospel of Mary Magdalene.
Here, the apostles weep and lament that the Savior is no longer with them. Mary instructs them that the Saviour is forever to be found, in the Silence.
Buddhism is old, and Gnosticism is ancient, but Nietzsche is available.