When we don’t know about things happening, we don’t judge them because they don’t enter our conscious mind.
Think about all the good and evil happening in the world at this exact moment. How can you even contemplate being concerned about these things? Your attention is a limited resource, spend wisely. Things happen without our opinion.
“We have the power to hold no opinion about a thing and not let it upset our state of mind, for things have no natural power to shape our judgements”, Marcus Aurelius wrote in his Meditations.
How you react to things when thoughts enter your conscious mind is something we can always change. The task is easier if you keep complaints and negativity out of your inner citadel. You will feel more calm and happy.