"All correct reasoning is a grand system of tautologies, but only God can make direct use of that fact"

This quote by Herbert Simon suggests that all sensible thinking is based on a system of self-evident facts, or tautologies. This indicates that logical reasoning is based on statements that are true necessarily, and also for that reason can not be verified or disproven. Nevertheless, Simon recommends that just God can take advantage of this fact, implying that just God can recognize the full implications of sensible thinking. This could be taken recommending that rational reasoning is restricted in its ability to describe the complexities of the universe, and that only God can really recognize the complete scope of truth. This can additionally be taken suggesting that logical reasoning is a tool that can be utilized to understand the world, but that it is eventually limited in its capacity to explain the full extent of truth. Inevitably, this quote recommends that sensible thinking is an effective tool, but that it is ultimately restricted in its ability to clarify the full range of fact, and that just God can absolutely understand the full implications of sensible thinking.