I love this quote:
Strive for the serenity to accept the things you cannot change;
courage to change the things you can; and wisdom to know the
It's the opening to the Serenity Prayer (from the Bible), but I've taken the liberty of replacing God grant with strive for.
The idiom "pick your battles" means the same thing as the 3rd goal.
This great quote from George Bernard Shaw relates closely to the 2nd goal:
The reasonable man adapts himself to the conditions that surround him...
The unreasonable man adapts surrounding conditions to himself...
Therefore, all progress depends on the unreasonable man
Think about these goals. You'll likely find that each goal is distinct, very important, and somewhat surprisingly often applies in your day to day life.