Thinking is the hardest work there is, which is the probable reason so few engage in it.

Summary

This quote by Henry Ford suggests that thinking requires significant effort and is a challenging task. It implies that people tend to avoid deep thinking or intellectual engagement because it demands substantial mental exertion. Ford's use of the word "probable" implies that the underlying reason for this avoidance is speculation rather than certainty. The quote highlights how the human tendency to avoid the demanding work of thinking results in a lack of engagement in critical and reflective thought processes.