In my mid-20s, while in college and working full-time as an avionics engineer, I often lay on the grass, gazing at the stars. Once, while sick and hospitalized, I snuck to the rooftop and prayed:
Oh God, if you exist and can hear me, and if you can interfere in this world, I do not pray for grades, money, wealth, fame, or even good health—those are my responsibilities. Grant me truth, wisdom, and use me as a beacon of truth. Make me a radiator of honest, fair, rational truth based on critical thinking, maybe mixed with some emotion and passion, to make lives around me a bit better.
I still remember this prayer, and it remains unchanged. Half a century later, I think I mostly received what I asked for: happiness, satisfaction, fulfillment, and a eudaimonic life. Another way to say it: God, grant me the power to change the things I can, the serenity to accept the things I cannot, and the wisdom to know the difference.