He keeps his road weel enough wha gets rid o' ill company.
He kens a'thing that opens and steeks.
He kens his ain groats amang other folk's kail.
He kens how many beans mak five.
He kens how to butter a whiting.
The import of the two preceding sayings is, that a man is very sharp in looking after his own interests.
He kens how to turn his ain cake.
"'Never fash your beard, Mr Bide-the-Bent,' replied Girder; 'ane canna get their breath out between wives and ministers. I ken best how to turn my own cake. Jean, serve up the dinner, and nae mair about it.'"—Bride of Lammermoor.
He kens muckle wha kens when to speak, but far mair wha kens when to haud his tongue.