That is, keep your own counsel on matters of danger or delicacy.
"'Thir kittle times will drive the wisest o' us daft,' said Neil Blane, the prudent host of the Howff; 'but I'se aye keep a calm sough.'"—Old Mortality.
Keep aff and gie fair words.
Or promise much, but perform little.
"The assets he carried off are of nae mair use to him than if he were to light his pipe wi' them. He tried if MacVittie & Co. wad gie him siller on them—that I ken by Andro Wylie; but they were ower auld cats to draw that strae afore them—they keepit aff and gae fair words."—Rob Roy.
Keep a thing seven years, and ye'll find a use for't.
Keep gude company, and ye'll be counted ane o' them.
Keep hame, and hame will keep you.
Keep out o' his company that cracks o' his cheatery.
Shun the company of him who boasts of his cunning.