I consider a quote by Charles Spurgeon on the secret to Christian happiness:
“We shall never find happiness by looking at our prayers, our doings, or our feelings; it is what Jesus is, not what we are, that gives rest to the soul. If we would at once overcome Satan and have peace with God, it must be by ‘looking unto Jesus’.”
As someone prone to near-constant self-evaluation of feelings, moods, behaviors, and lists of goals, I take great comfort is turning away from myself and back to Jesus. When I look to Jesus and His work on our behalf, His divine life within us, and His magnificence, I can absorb myself in worship and cease to measure the day by my changing emotions or flurry of activity. Then, we find a great peace and happiness in continuing to look to Jesus.