In reality....you shouldn't TRY to feel any way that doesn't reflect the circumstances that are in your life at the moment. When life is upbeat & positive...that's appropriate to feel that way.....when life is scary & dark, it's appropriate to feel those feelings at that time. It's feeling feelings that don't reflect the circumstances in your life that become a problem....but it's important to ALWAYS ACKNOWLEDGE the feelings that reflect the circumstances we are experiencing or to reflect thoughts that you are having......then be able to let go & acknowledge the feelings you are experiencing in the following circumstances.