Time, that is to say, past and future, is what the false mindmade self, the ego, lives on, and time is in your mind. It isn't something that has an objective existence “out there.” It is a mind structure needed for sensory perception, indispensable for practical purposes, but the greatest hindrance to knowing yourself. Time is the horizontal dimension of life, the surface layer of reality. p. 126

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "Time, that is to say, past and future, is what the false mindmade self, the ego, lives on, and time is in your mind. It isn't something that has an objective existence “out there.” It is a mind structure needed for sensory perception, indispensable for practical purposes, but the greatest hindrance to knowing yourself. Time is the horizontal dimension of life, the surface layer of reality. p. 126" in the context of "Eckhart Tolle in A New Earth: Awakening to Your Life’s Purpose (2005)" to mean that wisdom is timeless.