Passion is good, but it cannot become the fire that burns down the house. Emotions can lift, or it can weigh. Being able to see yourself almost from a third person is a good way to keep yourself from braving the full strength of emotional blasts, both positive and negative. Too much emotion can lead to paralysis, and hinder mobilization of action.
Being able to objectively view situations and emotion is very critical for mental stability, especially through a stressful time period. It is something that takes practice, and a daily reminder to do this is needed.
Also critical to consistency is a continued awareness of the big picture. What are the purposes of your actions you want to be consistent in? Where do you hope to go with being able to keep your nose to the grindstone with these actions for a long stretch of time? Do you want it enough to not become knocked off course by changes in circumstances and mentalities?