19!

What is true according to your society is not always objectively true.
What is great according to your society is not always objectively great.
I believe that by the time this world was born, it brought all the laws and things related to it.
It is our obligation as humans with ability to think rationally to discover it, also to find the truth and the meaning of things.
And again, I believe that it will not be an easy journey but I only live once, so...