If you turn to a branch of those sciences that try to give a solution to the questions of life--to physiology, psychology, biology, sociology--there you will find an astounding poverty of thought, a very great lack of clarity, completely unjustified claims to answer questions that lie outside their subject and never-ending contradictions between one thinker and others, and even within himself.

If you turn to a branch of the sciences that is not concerned with solving the questions of life but answers its own scientific, specialized questions, then you are captivated by the power of human intellect but you know in advance that there are no answers to the questions of life.

These sciences directly ignore the questions of life.

They say, "We have no answers to 'What are you?' and 'Why do you live?' and are not concerned with this; but if you need to know the laws of light, of chemical compounds, the laws of the development of organisms, if you need to know the laws of bodies and their forms and the relation of numbers and quantities, if you need to know the laws of your own mind, to all that we have clear, precise, and unquestionable answers.

Leo Tolstoy