Man is his own worst enemy.
[Lat., Nihil inimicius quam sibi ipse.]

Man is his own worst enemy.
[Lat., Nihil inimicius quam sibi ipse.]

What boots it at one gate to make defence,
And at another to let in the foe?

What boots it at one gate to make defence,
And at another to let in the foe?

Therefore if thine enemy hunger, feed him; if he thirst, give him
drink: for in so doing thou shalt read more

Therefore if thine enemy hunger, feed him; if he thirst, give him
drink: for in so doing thou shalt heap coals of fire on his
head.

He who seeks vengeance must dig two graves: one for his enemy and one for himself

He who seeks vengeance must dig two graves: one for his enemy and one for himself

He has no enemy, you say;
My friend your boast is poor,
He who hath mingled in read more

He has no enemy, you say;
My friend your boast is poor,
He who hath mingled in the fray
Of duty that the brave endure
Must have made foes. If he has none
Small is the work that he has done.
He has hit no traitor on the hip;
Has cast no cup from perjured lip;
Has never turned the wrong to right;
Has been a coward in the fight.

It is a man's own mind, not his enemy or foe, that lures him to evil ways.

It is a man's own mind, not his enemy or foe, that lures him to evil ways.

You must consider every man your enemy who speaks ill of your
king; and . . . you must read more

You must consider every man your enemy who speaks ill of your
king; and . . . you must hate a Frenchman as you hate the devil.

Hear not ill of a friend, nor speak any of an enemy.

Hear not ill of a friend, nor speak any of an enemy.

Friends may come and go, but enemies accumulate.

Friends may come and go, but enemies accumulate.