"keep to oneself" is a correct and commonly used phrase in written English.
It means to stay by oneself and not interact or share information with others. Example: She prefers to keep to herself at parties and doesn't like to engage in small talk with strangers.
Or perhaps they had just learned a lesson that Mr. Tale-Yax so clearly had not: better to keep to oneself than to risk the trouble that comes from extending a helping hand.
Basically, it's the same thing as Scalia not knowing anyone gay, and it may even be worse: In staying closeted to Scalia, these people may be tacitly sending him a message that homosexuality is something shameful that one should keep to oneself, or something that one should be afraid to speak about.
For example, some Christian home-sharers subscribe to the following Bible-based advice: in essence, a grievance with a housemate is not kept to oneself, but shared with the perceived offender.
Opinions about composers were best kept to oneself if he didn't like them, and there was his ability to drop friends – to "corpse" them – in order to protect his creativity.
"I have never seen wisdom do any good kept to oneself," said Hubbard.
You may swear by the health benefits of drinking your own urine, collect small porcelain figurines of animals dressed as humans, or organize your holidays around Barbra Streisand's touring schedule, but these are details best kept to oneself.
It's a Korean folk belief that stories are meant to be told, and that if one keeps them to oneself and hoards them there will be terrible consequences.
One of the taboos associated with this type of marriage requires sexual abstinence on the holiday associated with the lwa in order to keep oneself receptive to messages from one's spiritual spouse, primarily through dreams, on that particular night.
The mentors also appreciate the benefit derived from it and emphasize that guiding development of working practices supports their official duty, because it is "an excellent way to keep oneself up to date on what is happening in the day care centers".
That is why it's probably best to keep such information to oneself.
But given the circumstances, it is probably best to keep that thought to oneself, preferring instead to concentrate on remembering some urgent appointment.
