"There is a kind of courtesy in skepticism. It would be an offense against polite conventions to press our doubts too far"

This quote by George Santayana speaks to the value of being considerate and courteous when taking part in uncertainty. It is necessary to keep in mind that uncertainty is not a license to be rude or dismissive of other individuals's beliefs or opinions. Rather, apprehension ought to be used to thoughtfully and respectfully question and challenge ideas. Santayana is suggesting that it is essential to be conscious of the borders of politeness when participating in apprehension. We need to not press our doubts too far, as this could be viewed as an offense versus polite conventions. In other words, we ought to be respectful and considerate when participating in suspicion, and not take it too far.