Quote by Thomas S. Monson
Faith and doubt cannot exist in the same mind at the same time, for one will dispel the other.

Summary
This quote suggests that faith and doubt are incompatible and cannot coexist within a person's mind simultaneously. It implies that when one's faith is strong, doubt will be eliminated, and vice versa. The quote implies a dichotomy between faith and doubt, stating that these two states of mind cancel each other out. Thus, the presence of one negates the presence of the other.