People don’t like to think, if one thinks, one must reach conclusions. Conclusions are not always pleasant.

The remark frames thinking as an inherently demanding moral and psychological act. Keller suggests that many people avoid sustained reflection because genuine thought forces one to judge evidence, weigh values, and arrive at conclusions—commitments that can be uncomfortable or disruptive. The “unpleasant” quality of conclusions points to truths that may challenge self-image, social conformity, or entrenched prejudice. In this sense, the quote is less about intelligence than about courage: the willingness to follow reasoning where it leads, even when it produces inconvenient results. It also implies a critique of passive opinion and herd thinking, urging intellectual honesty and responsibility.