Opinionated assurance. [ Wendell Phillips ]

I'll make assurance doubly sure,
And take a bond of fate. [ William Shakespeare, Macbeth ]

Assurance is two-thirds of success. [ Gaelic Proverb ]

A combination, and a form, indeed
Where every god did seem to set his seal
To give the world assurance of a man. [ William Shakespeare, Hamlet ]

Modest assurance, good humour, and prudence, make a gentleman. [ Proverb ]

Some pretences daunt and discourage us, while others raise us to a brisk assurance. [ Glanville ]

Perpetual pushing and assurance put a difficulty out of countenance, and make a seeming impossibility give way. [ Jeremy Collier ]

Confidence, as opposed to modesty and distinguished from decent assurance, proceeds from self-opinion, and is occasioned by ignorance and flattery. [ Jeremy Collier ]

Bashfulness is more frequently connected with good sense than we find assurance; and impudence, on the other hand, is often the mere effect of downright stupidity. [ Shenstone ]

The fool maintains an error with the assurance of a man who can never be mistaken: the sensible man defends a truth with the circumspection of a man who may be mistaken. [ De Bruix ]

It unfortunately happens that no man believes that he is likely to die soon. So every one is much disposed to defer the consideration of what ought to be done on the supposition of such an emergency; and while nothing is so uncertain as human life, so nothing is so certain as our assurance that we shall survive most of our neighbors. [ Aughey ]