Sentence:  Presumably , if the reverse is the case and the good effect is more certain than the evil result that may be forthcoming , not only must the good and the evil be prudentially weighed and found proportionate , but also calculation of the probabilities and of the degree of certainty or uncertainty in the good or evil effect must be <WSD>taken</WSD> into account . 
Meaning of the word marked with <WSD> tags:  allow or plan for a certain possibility; concede the truth or validity of something