Sometimes, you may excuse your less-than-perfect happiness for a number of reasons, some of which are indeed logical (if not from a spiritual perspective). But at the end of the day, unhappiness will not accomplish anything, and will certainly not improve the situation. On the other hand, if you were to go to the other extreme . . . My father-in-law would compare this to soldiers who march out to battle to upbeat tunes of victory. This itself hastens and strengthens the victory. None of us are alone. G-d's help is always with us.
– The Rebbe, Igrot Kodesh