Sentence:  Ideas are our rudders. As the soul glides along the warm and swelling sea of feeling, it can only be turned to new points of the <WSD>moral compass</WSD> by them. 
Meaning of the word marked with <WSD> tags:  The full range of virtues, vices, or actions which may affect others and which are available as choices (like the directions on the face of a compass) to a person, to a group, or to people in general.