The Kingdom of God is Within You by Leo Tolstoy Chapter 5 Page 14

through habit and thoughtlessness to live in the same childish way as he did in boyhood.

That is just what is happening in the transition of humanity from one stage to another, through which we are passing now. Humanity has outgrown its social stage and has entered upon a new period. It recognizes the doctrine which ought to be made the basis of life in this new period.

But through inertia it continues to keep up the old forms of life. From this inconsistency between the new conception of life and practical life follows a whole succession of contradictions and sufferings which embitter our life and necessitate its alteration.

One need only compare the practice of life with the theory of it, to be dismayed at the glaring antagonism between our conditions of life and our conscience.