Francis Beaumont

All confidence which is not absolute and entire, is dangerous. There are few occasions but where a man ought either to say all, or conceal all; for, how little so ever you have revealed of your secret to a friend, you have already said too much if you think it not safe to make him privy to all particulars.

Let us have a care not to disclose our hearts to those who shut up theirs against us.

- Francis Beaumont