Facts are stubborn things. [ Smollett or Le Sage or Elliot ]

A hard goad for a stubborn ass. [ French Proverb ]

Fools are stubborn in their way,
As coins are hardened by the allay;
And obstinacy's never so stiff
As when 'tis in a wrong belief. [ Butler ]

A stubborn driver to a stubborn ass. [ French Proverb ]

The champion true
Loves victory more when, dim in view,
He sees her glories gild afar
The dusky edge of stubborn war,
Than if th' untrodden bloodless field
The harvest of her laurels yield. [ Keble ]

Toss'd on a sea of troubles, soul, my soul,
Thyself do thou control;
And to the weapons of advancing foes
A stubborn breast oppose. [ Archilochus ]

Noble plants suit not with a stubborn soil. [ Proverb ]

A noble plant suits not with a stubborn ground. [ English Proverb, collected by George Herbert ]

Fate leads the willing, but drives the stubborn. [ Proverb ]

The self-educated are marked by stubborn peculiarities. [ Isaac Disraeli ]

Arm the obdured breast with stubborn patience as with triple steel. [ Milton ]

All that philosophy can teach is to be stubborn or sullen under misfortunes. [ Goldsmith ]

Though authority be a stubborn bear, yet he is oft led by the nose with gold. [ William Shakespeare ]

All that the wisdom of the proud can teach is to be stubborn or sullen under misfortune. [ Goldsmith ]

Let us not throw away any of our days upon useless resentment, or contend who shall hold out longest in stubborn malignity. [ Johnson ]

The art of conversation is to be prompt without being stubborn, to refute without argument, and to clothe great matters in a motley garb. [ Beaconsfield ]

Obstinacy and heat in argument are surest proofs of folly. Is there anything so stubborn, obstinate, disdainful, contemplative, grave, or serious, as an ass? [ Montaigne ]