People see and hear so many things that most of them end up becoming swamped and indifferent. They allow their attention to skim over things without resting anywhere, and nothing makes an impression on them any more: they look without seeing and listen without hearing.
Habit rules their life and nothing can be more pernicious than letting themselves be ruled by habit – it deadens them.
Actually, the only habit to adopt is that of not becoming accustomed to anything, and of always looking at ideas, beings or objects in a new way, with a fresh eye.
Observe them, study them as if you were meeting them for the first time – you will then discover connections between them, and something of the life of the universe will reveal itself to you. From time to time, also try to breathe and eat as if for the first time.