The Hidden Power, and Other Papers upon Mental Science is a classic philosophy/New Thought text by Thomas Troward. There is an inner and an outer side to everything; and the quality of the superficial mind which causes it to fail in the attainment of Truth is its willingness to rest content with the outside only. So long as this is the case it is impossible for a man to grasp the import of his own relation to the universal, and it is this relation which constitutes all that is signified by the word "Truth."