Serenity with others... Means acknowledging there are 7 billions flavors of humanity, 7 billion opinions, 7 billion sets of fears and mine is just one of a vast collective. You gain knowledge and empathy by asking questions and listening, not by moving your own mouth.
Serenity with God... Or Buddha, or Allah, or Messiah, or a "Power of Intention" as Wayne Dyer calls it. A connection spiritually with some helping figure, or anything that inspires you towards a greater moral good and out of selfish desires. Proven over and over - the more you help others, the more comes back to you. A symbiotic relationship when done with honesty and good intentions.
"The Drunk Ages" - we are in. In the past century, we have experienced a massive escalation of sales of drugs, volumes of spiritual distractions (sports, movies, TV) and dopamine inducing technology. Collectively, they are causing a lot of fears, anger and polarizing opinions, tensions... and a lack of spirituality.
Serenity can only be found by you - your own life, how you approach things, how you manage expectations, how you react, how you look at the glass... Half full of hope and rising? Or totally emptied of the spirits, and your spirituality and spirit doused with the medication.
One life - one chance, treat your avatar right!
Power up with education.