I answered their questions 'to the best of my knowledge'. [=I gave the best answers I could based on what I knew, but I might have answered differently if I had known something else]
No one arrived late 'to my knowledge'. [=I am not aware that anyone arrived late, but it is possible that someone arrived late and I don't know about it]
They went on vacation, 'safe in the knowledge' that the farm would be well cared for while they were away.
(..) - Goodbye, Father. - Goodbye, son. Hurry back. Ah, Gideon, listen. The merry laughter... of little innocent children wending their way to school. Thirsty little minds rushing to the fountain of knowledge. School, a noble institution. What would this stupid world be without-- Well, well, well! (..)1940 Pinocchio
(..) Uh, oh, uh, Cricket's the name. Jiminy Cricket. - Kneel, Mr Cricket. - Huh? No tricks now. l dub you Pinocchio's conscience, lord high keeper ofthe knowledge of right and wrong, counsellor in moments oftemptation... and guide along the straight and narrow path. Arise, SirJiminy Cricket. (..)1940 Pinocchio