ignorance is bliss

to know through one's own experience

complete denial of knowing (an incident in question)

(Classical Japanese, archaic, honorific) to know

God only knows

to have no way of knowing; to be completely ignorant of

to make known

a female given name

public property, government property / imperial property, property of the Emperor or Imperial Court

a religion or religious sect that is officially recognized by the state / exotericism, the imparting of knowledge or learning to the public