A vow is a snare for sin
men do not suspect faults which they do not commit
When speculation has done its worst, two and two still make four.
To keep your secret is wisdom; but to expect others to keep it is folly.
Prejudice is a great time-saver. You can form opinions without having to get the facts. Prejudice not being founded on reason cannot be removed by argument.
But though it cannot be reasonable not to gain happiness for fear of losing it, yet it must be confessed, that in proportion to the pleasure of possession, will be for some time our sorrow for the loss.