Sentence:  That is why it is so very important that ethical analysis keep clear the problem of decision as to `` permitted '' effects , and not <WSD>draw</WSD> back in fright from any conceivable contingency or suffer paralysis of action before possibilities or probabilities unrelated , or not directly morally related , to what we can and may and must do as long as human history endures . 
Meaning of the word marked with <WSD> tags:  pull back or move away or backward