Nothing is true.
This quotation, of Italian origin which has been utilised in the popular game Assassin’s Creed, makes you stop and think.
It reminds us that there is no reality (no “truth”) and that our reality is merely our perception.
If your reality is your perception and others realities are their perceptions then you begin to be more understanding of differing viewpoints and opinions.
There is no right or wrong.
Only our perceived truth.