"The ego is as little absolutely permanent as are bodies"

Ernst Mach's quote is a suggestion that nothing in life is long-term. He is describing the ego, which is the part of the mind that is accountable for an individual's sense of self. The ego is continuously changing and evolving, much like our physical bodies. Mach is suggesting that we need to not become too attached to our ego, as it is not a fixed entity. Rather, we ought to be open to alter and development, and accept that our ego is in a constant state of flux. This quote encourages us to be versatile and to accept modification, rather than clinging to our ego and trying to maintain a sense of permanence. Mach's quote is a tip that life is ever-changing, and that we must be open to the possibilities that feature it.