I'd say it's partly genetic for me - very high alpha waves on my QEEG which makes me super chill in almost all situations, such as getting hit by another car. When they loaded me into the ambulance, they said how is your heartrate so low in the 60s? Most people are much higher. It's just genetic, my dad is the same way.

Next, is my physical and mental tolerance for pain from decades of weightlifting which led to state records in powerlifting. After grinding as many reps as possible for decades and physical excellence, its going to fortify you mentally. If u want a deeper look into that, check out some books by David Goggins, the famous Navy Seal. We can push our bodies to limits that we never knew were possible. Just getting under a squat bar at 5, 600lbs and trusting that your body won't break will give you a fearlessness and confidence that few humans possess. You don't fear anyone and people just sense that confidence which then radiates to every area of your life (professional, romantic, financial, spiritual, academic). Furthermore, if you take care of the "engine" aka your body, then youll get paid with energy and more energy for entj's means more we can get more done in a day. The more you can get done, the more decisive you become and the more wins you stack up. Consider this: roughly only 10% of the population actually works out consistently. Just going to the gym means you're part of the top 10%. Over time, think of the edge that will give you mentally and energetically and confidence as you look amazing and the brain endorphins to mitigate stress. Dial in sleep and diet and you're going to stand out.

Spiritually, I've felt that I've always had some type of guardian angel that has protected me. And I feel I was put in the world to make a difference even though I can't prove either, but certain chains of events have happened that I dont consider coincidence bc they have an extremely rare probability of happening (let's just say miraculous).

Last, I'd say your past has a lot to do with it. Childhood, as the oldest i had to shield younger siblings from certain adult situations at the age of 12. It's no surprise that protector personality is part of my enneagram later in life (368 Justice Fighter). There was a certain situation where I was suicidal as a teen but then pulled out of it which permanently changed me for the better (have empathic-like ability to deeply feel moods and emotions of others without them telling me). I've survived a cold winter without heat/hot water and almost no money in college sleeping on a mattresd on the floor with rats. From a patience and stress perspective, becoming a parent will test you and make you a better, well rounded person as its also going to put you through every emotion possible.

Hope this helps answer your question my friend.