The Note-Books of Samuel Butler

Memory and forgetfulness are as life and death to one another.  To live is to remember and to remember is to live.  To die is to forget and to forget is to die.  Everything is so much involved in and is so much a process of its opposite that, as it is almost fair to call death a process of life and life a process of death, so it is to call memory a process of forgetting and forgetting a process of remembering.  There is never either absolute memory or absolute forgetfulness, absolute life or absolute death.  So with light and darkness, heat and cold, you never can get either all the light, or all the heat, out of anything.  So with God and the devil; so with everything.  Everything is like a door swinging backwards and forwards.  Everything has a little of that from which it is most remote and to which it is most opposed and these antitheses serve to explain one another.