One can mistrust one's own senses, but not one's own belief. If there were a verb meaning "to believe falsely," it would not have any significant fir… - Ludwig Wittgenstein

"If there were a verb meaning "to believe falsely," it would not have any significant first person, present indicative."

Ich möchte den Ausdruck ' Ich weiß ' für die Fälle reservieren , in denen er im normalen Sprachverkehr gebraucht wird.

I am sitting with a philosopher in the garden; he says again and again 'I know that that’s a tree', pointing to a tree that is near us. Someone else arrives and hears this, and I tell him: 'This fellow isn’t insane. We are only doing philosophy.

If God had looked into our minds he would not have been able to see there whom we were speaking of.