Student or Learner
Whatever the word we use, I think that the concept we will eventually have to come to is one that Alfred Adler suggested a long, long time ago when he spoke of the "older brother." The older brother is the loving person who takes responsibility, just as one does for his young, kid brother.
(The Farther Reaches of Human Nature; Abraham H. Maslow)
Would you be so kind as to tell me whether it should be read as follows:
The older brother is the loving person who takes responsibility [in general, I suppose, it is not specified who/what the loving person takes responsibility for], just as one takes responsibility for one's young, kid brother.
Congratulations! You understand the sentences correctly.
I am not a teacher.