Let no man turn aside, ever so slightly, from the broad path of honour, on the plausible pretence that he is justified by the goodness of his end. All good ends can be worked out by good means.
Courage becomes a worthwhile and meaningful virtue when it is regarded not so much as a willingness to die manfully but as a determination to live decently.
Sta come torre ferma, che non crolla
Giammai la cima per soffiar de' venti.
Be steadfast as a tower that doth not bend its stately summit to the tempest's shock.
Something might be true while being harmful and dangerous in the highest degree. Indeed, it might be a basic characteristic of existence that those who know it completely would perish, in which case the strength of a spirit should be measured according to how much of the 'truth' one could still barely endure- or to put it more clearly, to what degree one would require it to be thinned down, shrouded, sweetened, blunted, falsified.
If one has no affection for a person or a system, one should feel free to give the fullest expression to his disaffection so long as he does not contemplate, promote, or incite violence.