We must be prepared to experience loss, and when that happens we must be ready to learn from the loss we experience. Maybe it will disturb our mentality a little, but I think it is a normal thing, what we have to do is quickly recover from these disturbing feelings.
These things are very imperative that have to be learned, for example we must be prepared for any event that is very unpleasant, an experience that happened to me as soon as I graduated was going to the capital of my country, where I was working there, and I proposed to be mentally prepared that I could go out and be robbed, because the insecurity is terrible, and the times that I went out they tried to rob me, only I was not prepared and my reaction was to grab my assailant and throw him out to the street to beat him, but I do not know why I did it, it was my reaction, and then they would run away, but then my adrenaline went down, I was very scared because I do not know why I reacted that way, the same thing happens in almost soo, one must be prepared to lose too.