Everything is a perception, be careful not to call it reality!

We can only perceive based on what input we get from our sense organs (including brain). We process the inputs, create a perception based on it and act upon it. Somewhere along this process, we get strongly attached to this perception and consider it a reality. It is real, but only in the context of our perception. We are co-creators of this reality and it does not exist without us. A simple example is birds don't feel as cold as humans because their body temperature is higher. What is cold to us is not cold to them. Same thing for mental formations. My mental formation might be different from your based upon how we relate to a particular situation. The thing that causes me a lot of agony might not bother you and vice-versa. The point is that if we can keep in mind that what we think as reality is only one facet of reality, based upon our conditions, we might be able to let go easily and not get stuck on things. We also can become more tolerant of other people's views, their conditions and their reactions.