Dont let them fool you.

Happiness

-to be happy is a transient state of being.

too little happiness causes depression.
too much happiness creates delusion.

catch 22? no..

everytime when faced with choice, ask yourself "is this the best choice?"
will this make me the happiest?

answer it the best way you can, but ultimately, having the choice already made you a happy person. and between depression and delusion, carry on walking the fine line, but know that its about making the most of the happy moments, and riding out the not-so-happy ones.
with as much dignity and grace as you can muster.