Not everyone believes this but the emotional and mental aspects of a person, when combined, leads to better self improvement.
Emotions love to dominate our actions and reactions, even though we do not want it to happen sometimes. The society often see emotions as a sign of weakness, so people are used to putting them aside and focusing on the rational aspects more and more.
No matter how strict and logical you may be, you will always feel. One way or another, someone or something will get through you.