Verbal communication is not the only form of communication. We inevitably interact with each other nonverbally simply by breathing the same air and existing in the same world.
Neglecting nonverbal communication results in the perception of being impersonal, not caring, artificial. Neglecting verbal communication results in the perception of being clumsy, stupid, indecisive.
Understand yourself; understand others. Treat communication not only as something that has a beginning and end in time, but as something which continuously travels with you your whole life.
Both verbal and nonverbal communication begin with your own thoughts. Subconsciously, much of these thoughts will be reflected unto others nonverbally through your behavior. Verbal communication requires focus of the mind, and you can achieve that more easily if your mind and throughts are clear.
Verbal and nonverbal communication complement each other.