INTRODUCTION
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standing . Indeed, what is often called at the present time "the only true science" can, for the attainment of this goal, be a hindrance rather than a help . For this science too often permits to be considered "real" only what is perceptible to the ordinary senses . And however great its merit is in regard to the knowledge of THAT reality, it creates at the same time a mass of prejudices which close the approach to higher realities . In objection to what is said here it is often brought forward that "insurmountable limits" have been once and forever set to human knowledge, and that, since one cannot pass beyond these limits, all branches of investigation and knowledge which do not take them into account must be rejected . And a person who wishes to make assertions about things which many regard as proved to lie beyond the limits that have been set to human capacities of knowledge, is looked upon as highly presumptuous . Those who make such objections entirely disregard the fact that a DEVELOPMENT of the human powers of knowledge has to precede the higher knowledge . What lies beyond the limits of knowledge BEFORE