I had an appointment for my car to have a routine service, but had to cancel the appointment. Later that day my car broke down and required expensive work. I later thought about the number of times in the past that I had spoken ill of auto mechanics for cheating and being untrustworthy. I realized that if I had taken my car in for the routine service, I would have incorrectly blamed it on the mechanic when it later broke down. I never would have believed that the car broke down on its own, I would have suspected foul play.
Animals exhibit physical strength.
But courage, spiritual strength, only applies to people. Physical talent can be developed, but the potential is basically inborn. Either you have the potential to play professional basketball or you don't. The basic talent must be there. When it comes to spiritual strength, everyone has the same opportunity to excel.