“There is only one thing in your life YOU can be sure of. That one thing is this moment, now. The last moment has gone forever. The next moment has not come. YOU can become fully conscious only when you are living in the moment. To begin to live in the moment you have to know it exists and understand it. To understand it you have to observe it in relation to yourself and in relation to life. When you understand it, when you become conscious, you will see it is all that exists. To see this is to glimpse reality.”
Source : "Knowing Yourself: The True in the False". Book by Barry Long, 1996.