Sentence:  Science and art without <WSD>morality</WSD> are not dangerous in the sense commonly supposed. They are not dangerous like a fire, but dangerous like a fog. 
Meaning of the word marked with <WSD> tags:  Recognition of the distinction between good and evil or between right and wrong; respect for and obedience to the rules of right conduct; the mental disposition or characteristic of behaving in a manner intended to produce morally good results.