In the long way that we take, in our growing up, in the vicissitudes of life by which we are led into its meaning and its mystery, there are established for us, for each one of us, certain landmarks. They represent discoveries sometimes symbolizing the moment when we became aware of the purpose of our lives; they may establish for us our membership in the human frailty; they may be certain words that were spoken into a stillness within us the sound thereof singing forever through all the corridors of our being as landmarks; yes, each one of us has our own. No communication between people is possible if there is not some mutual recognition of the landmarks.

Howard Thurman in The Inward Journey