this sentence shows that you should be single-minded in doing things, and your essence is not much more expensive. In this era of knowledge explosion, if you are a genius, it will be unfortunate if you don't concentrate. If you have ordinary qualifications, please don't be pessimistic. As long as you make up your mind to do one thing well all your life, you will succeed.
versatile: having many talents and skills. Metaphor is a person who knows many skills, but is not expert.
Unique hidden weapons: refers to unique skills. Metaphor is a person who is proficient in only one skill.
A famous saying about being single-minded:
An omnipotent person can do nothing, and an expert who knows everything knows nothing.
learning is more important than learning.