A.I. Explanation:

Option 1: "The good teacher remembers his own youth, and so can feel with the student who comes to him."

Explanation: This option suggests that a good teacher relates to students by recalling their own experiences. However, the text focuses on the relationship built through love and respect rather than personal memories. Therefore, this option does not align with the main idea presented in the text.

Option 2: "The love of the teacher for his pupil will bring out love from the pupil in turn."

Explanation: While this option touches on the theme of love, it does not encapsulate the main point of the text. The author emphasizes that a teacher's love leads to obedience and respect, rather than just mutual affection. Thus, it is too narrow and does not fully represent the author's argument.

Option 3: "If the teacher loves the student, the question of punishment will never arise."

Explanation: This option implies that love eliminates the need for punishment, which is not the focus of the text. The author discusses how love leads to compliance with rules, but does not state that punishment is irrelevant. Therefore, this option misrepresents the author's main point.

Option 4: "The wise teacher will gain his ends through love."

Explanation: This option accurately reflects the main idea of the text. The author argues that a teacher who fosters love and respect among students will achieve better results and compliance with rules. This aligns with the text's emphasis on the effectiveness of a loving teacher-student relationship.