Possibility of Probability (POP)

Once you know the Possibility of Probability (POP)
Your life will never know the word Disappointment.

Suppose you’re decided to buy a bike. If you know the ‘Possibility of Probability’, i.e. the list of events happening after you purchase the Two-Wheeler.

Let’s discuss what will happen after..
The bike gets lost immediately or later.
The same day you banged your bike. 
One day if you miss your vehicle papers, that is the day you will be caught by traffic police.
You would have given your bike to your friend. He may use it for banned products and get caught with police or met with an accident or killed someone in an accident that leads to your vehicle ceasing.
Vehicle is not starting in the morning, when you have an important meeting or run out of fuel or tyre getting flat during the journey.
I hope you can add some more and register in the mind that anything above can happen at any time. Once you understand the nature involved behind the purchase of a vehicle then you never ever get disappointed. 
Actually it may be one way of getting aware of what leads to disappointment. 

Now, you can apply the same, Concept of Possibility of Probability to all things and relationships in life. If you have a relationship which you feel is more than your life, it may be your lover or husband or parents or childrens or Brothers or sisters.
If you are prepared enough then you won’t be disappointed coz you know the Possibility of Probability will be handy to deal with like…They may leave you suddenly, by death or choosing something more important than you.
They catch incurable diseases.
They abuse you, they may lead to your problem, which you will never be able to solve.
They insult and ignore you for non reasoning.
etc etc…

Once you’re familiar with the concept of POP then you’re a master of your own destination.
Just try.