It will always be an advantage at all aspects if you are knowledgeable. How to be ba smart? Make yourself learn something new. Learning is a nwver ending process. Even you have doctorate degree or whatever, there are things you dont know. Learning is for everyone.
Learning is the key as it enhances your knowledge and give you first-hand information and which can be used in your daily or professional life. One should keep reading and learning in areas of their interest and this keeps you on toes as well as in today's fast paced world things changes quickly and do not want to be outdated.