Know the facts.
What are the facts?
Know the truth.
What is the truth?
That is something you will have to find out for yourself. You must judge what you find acceptable, reasonable and plausible. Your view of the world through your eyes is unique. Your reality is different to that of your neighbour.
Are you colourblind? Then you will perceive the world differently than those who aren’t.
Are you left handed? You will have made different experiences than right handed people.
There are no hard and fast rules.
This is what makes things so complicated.
This is what keeps things interesting.