This saps our energy and spoils our clarity. Certainly there are times when particular emotions are inappropriate to display. The ability to master our emotions is often a measure of maturity and one of the things that makes us a civilized society. But if we constantly stuff our feelings and don't express them, they become at best unnecessary baggage extra weight dragging us down. At worst, they become bottled up energy that can explode in catastrophic ways.
Men especially have a hard time expressing their emotions.
They often fear that a display of emotion will look like weakness. This just isn't true. By expressing how we truly feel and releasing the pent-up feelings, we free ourselves to be more of who we truly are we become more powerful. And it's a learned skill. We get better at it the more we do it especially when we take responsibility for those feelings instead of blaming something or somebody else for them.