Sentence:  Confining ourselves, for the moment, to <WSD>sensations</WSD>, we find that there are different degrees of publicity attaching to different sorts of <WSD>sensations</WSD>. If you feel a toothache when the other people in the room do not, you are in no way surprised; but if you hear a clap of thunder when they do not, you begin to be alarmed as to your mental condition. 
Meaning of the word marked with <WSD> tags:  A physical feeling or perception from something that comes into contact with the body; something sensed.