Is good the new great?

Today  I feel good...  Yesterday I felt good...  Tomorrow I will probably feel good...  Lucky me.  I sometimes wonder what it would be like to suffer from bipolar disorder because I often pine for that manic feeling of euphoria and all the energy that does with it.  Instead, I just plod along, feeling "ok", waiting for that elusive, fleeting moment when my neurotransmitters give me an extra dose of joy.  Don't get me wrong, I am happy that I now feel good.  Feeling good is an excellent alternative to contemplating the "best" way to kill myself.  Definitely an improvement.  But is it unrealistic to want to feel great?  How does one get from "good' to "great"?  I do all the right things; eat well, exercise, act selflessly, follow the commandments...  But, I don't really do it with all my heart.  Maybe I am just not trying hard enough.  I am so tired though...  It is so much easier to just get by.  Perhaps I should listen to St. Paul when he says "And whatsoever ye do, do it heartily".