ideas and idealisms are in themselves hypotheses not finalities. Being connected with operations to be performed, they are tested by the consequences of these operations, not by what exists prior to them. Prior experience supplies the conditions which evoke ideas and of which thought has to take account, with which it must reckon. It furnishes both obstacles to attainment of what is desired and the resources that must be used to attain it. Conception and systems of conceptions, ends in view and plans, are constantly making and remaking as fast as those already in use reveal their weak- nesses, defects and positive values. There is no predestined course they must follow. Human experience consciously guided by ideas evolves its own standards and measures and each new experience constructed by their means is an opportunity for new ideas and ideals.