The ability to discern things or facts in life is an essential element. However, in order to discern something, you must have the ability to see things as they are. You have to be able to see, so you can accurately recognize what you want to discern and find the exact criteria that make discernment possible.
It is so difficult to find someone with the right discernment ability in reality. Because people live their lives chasing their desires or ideals, they try to see what exists and discern it based on criteria from their desires or ideals.