What you have said in the dark will be heard in the daylight, and what you have whispered in the ear in the inner rooms will be proclaimed from the roofs.
The reason why most secrets end up getting out is because sometimes, the shock of your own secret catches you so off guard, that you can't help but tell someone about it. AND, as much and as often as you say, "Don't tell anyone," that same shock value is still in effect and will be told to others, and others, and others! Today, you better be sure that whatever you can't keep to yourself, is something that will not come back to haunt you in the days to come. My advice, tell it to Jesus who you know will not tell anyone!