Hell if I know. The same thing that gives me strength in one instance, weakens me in another.
I don't assign strength to people or god.
I keep going because I don't do "weak". Now, weak for me doesn't mean I would view it as weak for you. I don't like being touched. I am uncomfortable with affection. Anything intimate is hard, whether it's physical or emotional. I have been able to avoid massages my entire life, because I viewed them as a recreational activity that is neither necessary nor wanted. Then, I was advised by several doctors to begin massage therapy for injuries. My knee jerk reaction is "f*ck, no." Here is where I find my "strength." I don't do weak or fear. It's okay to have fear, but it's not acceptable for me to back away. So, I got a massage. Because, well, f*ck you. Right? It was not a pleasant experience, and definitely not advisable, triggered, sick, gone, out etc. Long story short, it turned into a sort exposure therapy, I say sort because I was in no way safe and I did stupid trauma worthy things. What got me through it though, was I am going to beat the fear and weak out of me or die trying.
It may not be strength, but it's the closest thing I have to understanding it. Maybe it's just stupidity.