National security laws must protect national security. But they must also protect the public trust and preserve the ability of an informed electorate to hold its government to account.
It is sublime to think and say of another, I need never meet, or speak, or write to him: we need not reinforce ourselves, or send tokens of remembrance; I rely on him as on myself: if he did thus and thus, I know it was right.
To have faith is to trust yourself to the water. When you swim you don't grab hold of the water, because if you do you will sink and drown. Instead you relax, and float.
Whoever deliberately attempts to insure confidentiality with another person is usually in doubt as to whether he inspires that person's confidence in him. One who is sure that he inspires confidence attaches little importance to confidentiality.