"Knowledge determines the lower limit and vision determines the upper limit", which means that the accumulation of knowledge can determine the bottom line of a person's ability, while the breadth of vision determines the highest level that can be achieved.
Specifically, knowledge is a person's foundation and determines his ability bottom line. No matter in which field, you can't do your job without enough knowledge, let alone make a breakthrough. Vision determines vision and cognitive range. A broad-minded person can see more opportunities and think more comprehensively, so as to break through personal limitations and achieve higher achievements.