The end must justify the means. [ Prior ]

Not to repent of a fault is to justify it. [ Proverb ]

It is a bad action that success cannot justify. [ Proverb ]

Sins may be forgiven through repentance, but no act of wit will ever justify them. [ Sherlock ]

There are few things that are worthy of anger, and still fewer that can justify malignity. [ Johnson ]

Human reason has so little confidence in itself that it always looks for a precedent to justify its decrees. [ De Finod ]

So long as thou art ignorant, be not ashamed to learn : he that is so fondly modest, not to acknowledge his own defects of knowledge, shall in time, be so foully impudent to justify his own ignorance; ignorance is the greatest of all infirmities, and, justified, the chiefest of all follies. [ Quarks ]

Wherein is it possible for us, wicked and impious creatures, to be justified, except in the only Son of God? O sweet reconciliation! O untraceable ministry! O unlooked-for blessing! that the wickedness of many should be hidden in one godly and righteous man, and the righteousness of one justify a host of sinners! [ Justin Martyr ]