"It generally happens that assurance keeps an even pace with ability"

This quote by Samuel Johnson recommends that one's level of confidence is normally proportional to their level of capability. In other words, the more capable a person is, the more positive they will be in their capabilities. This is since when an individual has the abilities and knowledge to do something, they will be more likely to feel secure in their ability to do it. On the other hand, if an individual lacks the essential abilities or understanding, they will be less most likely to feel confident in their ability to do something. This quote is a reminder that self-confidence is often a reflection of one's ability, which it is very important to develop the abilities and knowledge necessary to be successful.