Summary
This quote suggests that when people exhibit intolerance towards beliefs or ideas different from their own, it reveals a lack of confidence or belief in their own cause. It implies that those who are sure of their beliefs do not feel threatened by differing perspectives or the coexistence of diverse ideas. Intolerance, therefore, may be seen as a sign of insecurity or doubt in the validity or strength of one's own beliefs, highlighting the importance of open-mindedness and respect for different viewpoints.