Spoken when too bad persons are at variance over some evil work.
_The deil's bairns hae deil's luck_.

Spoken enviously when ill people prosper.
_The deil's a busy bishop in his ain diocie_.

Bad men are sure to be active in promoting their own bad ends.

A quaint proverb of this class I have been told of as coming from the reminiscences of an old lady of quality, to recommend a courteous manner to every one: _It's aye gude to be ceevil, as the auld wife said when she beckit[135] to the deevil_.
_Raise nae mair deils than ye are able to lay_.

Provoke no strifes which ye may be unable to appease.
_The deil's aye gude to his ain_.