I found this sign next to the Church Circle.

It's a translation of what Joseph Joubert (1754–1824) a French thinker said.
He had more insight and wisdom than some other philosophers that lived
at his time or in the two centuries after him.
One of his central points where he did not commit the mistakes
of "modern philosophers" was the knowing that truth exists
and was there before we discovered it.
Thruth exists and can not be invented or changed by men.