And yet there are some men here in this Senate who either genuinely fail to see, or make a pretense of not seeing, the disasters by which we are menaced. Their mildness has fostered Catiline’s hopes, and their refusal to believe in his growing conspiracy has given it strength. Had I punished Catiline, their influence would cause many persons, some of them malignant but others merely ignorant, to say that I had acted with tyrannical brutality.

[Quamquam non nulli sunt in hoc ordine qui aut ea quae imminent non videant aut ea quae vident dissimulent; qui spem Catilinae mollibus sententiis aluerunt coniurationemque nascentem non credendo conroboraverunt; quorum auctoritate multi non solum improbi verum etiam imperiti, si in hunc animadvertissem, crudeliter et regie factum esse dicerent.]

Marcus Tullius Cicero (106-43 BC) Roman orator, statesman, philosopher

Orationes in Catilinam [Catilinarian Orations], No. 1, § 12, cl. 30 (1.12.30) (63-11-08 BC) [tr. Grant (1960)]
    (Source)

Urging the Senate banish Catiline before he and his followers overthrow the Roman Republic.

(Source (Latin)). Alternate translations:

Although there are some in this House, who either not see what is imminent, or dissemble what they see; who have cherish'd the hopes of Catiline with useless (?) Votes, and have confirmed the rising Conspiracy, by not believing it: whose Authority many, not onely out of malice, but of simplicity following, had I executed him, would have said, it had been a cruel and tyrannical Act
[tr. Wase (1671)]

Yet even now, in this very assembly, there are senators, and those not a few, who do not see the impending danger; or, seeing it, think proper to disguise their sentiments. By specious moderation they have pampered the hopes of Catiline, and, affecting to think my fears no more than a false alarm; they favoured the conspiracy in its birth; By their example numbers have been influenced; the evil-minded raised a spirit of discontent, and the weak joined in the clamour, All of that description would be ready to pronounce the death of Catiline the act of a violent and arbitrary Consul.
[tr. Sydney (1795)]

Though there are some men in this body who either do not see what threatens, or dissemble what they do see; who have fed the hope of Catiline by mild sentiments, and have strengthened the rising conspiracy by not believing it; influenced by whose authority many, and they not wicked, but only ignorant, if I punished him would say that I had acted cruelly and tyrannically.
[tr. Yonge (1856)]

Although there are in this assembly some who either may not see those things which are impending, or who may conceal their knowledge of those things which they see; who have nourished the hope of Catiline by mild opinions, and who have strengthened the growing conspiracy by not believing it; following whose authority many, not only the wicked, but also the unskillful, if I should have inflicted punishment on him, would say that this had been done cruelly and tyrannically.
[tr. Mongan (1879)]

Although there are some in this order (assembly), who either may see not those (things) which impend, or may dissemble those (things), which they see: who have nourished the hope of Catiline by soft (mild) opinions, and have strengthened the growing conspiracy by believing (it) not. The authority of whom many having followed, not only the dishonest, but also the unskillful, if I might have animadverted upon him (if I had punished him), would say (it) to have been done cruelly and royally (tyrannically).
[tr. Underwood (1885)]

Although there are some in this order [body], who either may not see these (things) which impend, or may dissemble those (things) which they see: who have nourished the hope of Catiline by soft [mild] opinions, and have strengthened the growing conspiracy by not believing (it). The authority of whom many have followed, not only the dishonest, but also the inexperienced, if I had given attention to [punished] him they, would say )it) to have [had] been done cruelly and royally [tyrannically].
[tr. Dewey (1916)]

And yet there are several men in this body, of the kind who either do not see what is threatening to them, or disguise what things they see, and these men nourish the hope of Catiline by tender notions and strengthen the young conspiracy by not believing; by whose authority many not only wicked (men), but also inexperienced (men), if I were to have (Catiline) punished , would say that it had been done cruelly and despotically.
[IB Notes]