If you get into it more deeply, a few conclusions would arise:

1. you can't experience happiness all the time
2. negative emotions are a natural response to unpleasant stimuli and thoughts of unpleasantness (of that which is not wanted)
3. if you understand negative emotions as a correcting mechanism, telling you where you need to change focus, you can be happy most of the time and grateful for the 10% of the time that you are not because it gives you a valuable course correcting feedback