Ye work by Macfarlane's lantern.
"The clan of MacFarlane, occupying the fastnesses of the western side of Loch Lomond, were great depredators on the Low Countries, and as their excursions were made usually by night, the moon was proverbially called their lantern."—Note to Waverley.
Ye yirr and yowl—ye bark, but daurna bite.
Young cowtes will canter.
"Meg, on her part, though she often called them 'drunken neer-do-weels, and thoroughbred High Street blackguards,' allowed no other person to speak ill of them in her hearing. 'They were daft callants,' she said, 'and that was all—when the drink was in, the wit was out; ye could not put an auld head upon young shouthers; a young cowt will canter, be it up hill or down—and what for no?' was her uniform conclusion."—St Ronan's Well.
Young ducks may be auld geese.
"A man at five may be a fool at fifteen."
Young folk may dee, auld folk maun dee.
Young saints, auld sinners.