"Never allow any unnecessary or vain thought to occupy your mind. This is more easily said than done. You cannot make your mind a blank all at once. So in the beginning try to prevent evil or idle thoughts by occupying your mind with the analysis of your own faults, or the contemplation of the Perfect Ones."

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Monetary calculation is not the calculation, and certainly not the measurement, of value. Its basis is the comparison of the more important and the less important. It is an ordering according to rank, an act of grading (Cuhel), and not an act of measuring. It was a mistake to search for a measure of the value of goods. In the last analysis, economic calculation does not rest on the measurement of values, but on their arrangement in an order of rank.

— Ludwig von Mises