Ignorance is not bliss. Ignorance is poverty. Ignorance is devastation. Ignorance is tragedy. And ignorance is illness. It all stems from ignorance.
The worst kind of arrogance is arrogance from ignorance.
Don't be afraid to borrow if someone else has said it well. Winston Churchill said, The truth is incontrovertible. Malice may attack it and ignorance may deride it, but in the end, there it is. That's so well said. You could stay up all night and not think of that.