You can't climb up to the second floor without a ladder. When you set your aim too high and don't fulfill it, then your enthusiasm turns to bitterness. Try for a goal that's reasonable, and then gradually raise it.
After voluntary exertions on the part of our people to which the history of the world furnishes no parallel, is the old root of bitterness still to remain in the ground, to sprout and bear fruit in the future as it has borne fruit in the past?
I wouldn't call it bitter. I think it's just sweet. I've always believed my life seems like it's gotten better and better as each decade has gone by. So I don't see any I don't see any bitterness about it.