I have a theory.
Though this theory could probably have been invented sometime back in the days when mankind was still at its dawn, I could not help but to share this thing I have been looking at each time I found some free time to spend everyday.
Many people, essentially, look at misfortunes as, well, unfortunate. And quite the other way around for the opposite of them.
But the way I see it after careful looks into the whole idea is that, fortunes and misfortunes, statistically actually create a better you in terms of specifically stressing you out up and down by letting you fly so high in the sky and drown in certain series of unfortunate events that there could be days when you finally decided that what you went through was not worth it and ending it could be the best possible choice to be taken immediately before it is too late.
The way I see good and bad events is that, each time one of them occurs to you, let say at a higher degree in the scale of goodness/badness, it will push your deviation (upper and lower limit) away from the centroid or the neutral plane. Once pushed up, it will stay there and states a new benchmark in your happiness and sadness level. Refer to the graphs I made below:
So now you have an upper limit and a lower limit. Whatever happens, your happiness and sadness will be in the range of this two limits. However, these limits are dynamic - they can be moved but only further from the normality line and not anywhere closer.
As to further explain my thoughts, let's look at Figure 2. Figure 2 shows a number of events where one may experience increasing joy from getting things that drive him/her happy. As the level of joy increases, so is the limit of happiness. It means that, lets say he/she gets the lightsaber first, which in this case is the major source of joy, followed by the other three. This will result that, though the following three events are still sources of joy for him/her, they will hardly beat the joy he/she gets from the lightsaber. Means, he/she could still be happy, but not as happy. In order for him/her to be happier, he/she has to get something that has higher degree in the scale of joy to push his/her limit of happiness more upward to overwrite the joy from getting a lightsaber. At this point, getting a lightsaber is nothing as compared to getting, say, a Millennium Falcon which bears a higher degree in the scale of joy.
So is to the limit of badness.
This means, if you have ever fall into a drain and then one day for some reasons you happen to fall into the Straits of Malacca, this pushes your limit further down from the previous experience with drain. To you now, falling into a drain is nothing as compared to falling into the Straits of Malacca. And in order to top that, you have to fall perhaps from the open space towards the surface of the earth as to set a new point of benchmark for your limit.
Therefore, if these patterns for both limits go along in a growing trend, exponentially there will be a time where a critical point takes place. This is where the demand to happiness/sadness increases drastically away from the future predicted event. This is where one can say, "it has to be more than this to make me happy" or "it has to take a lot more to hurt me than this", for which although it makes you stronger from bitter sadness, alarmingly it also makes you greedy and hard to satisfy when it comes to pleasing you.
So from here, you can actually tell that it is really true that a human may become very greedy when showered with too many things (nothing satisfies!) and as well stronger as one goes through a lot of shits to come out clean on the other side (Satan, I spit in your face!) as long as he/she does not give up fighting.
So...do you think it makes sense?