Full Idea
I should prefer to exclude the bad result, the consequences, from the question of value as a matter of principle. Faced with a bad result, one loses all too easily the right perspective for what one has done.
Gist of Idea
A bad result distorts one's judgement about the virtue of what one has done
Source
Friedrich Nietzsche (Ecce Homo [1889], Clever §1)
Book Reference
Nietzsche,Friedrich: 'On the Genealogy of Morals/ Ecce Homo', ed/tr. Kaufmann,Walter [Vintage 1969], p.236
A Reaction
If the perspective is easily lost, we should make more effort, not ignore consequences. The question is whether you could have foreseen or controlled the consequences.