Teacher : "Which is more important to us, the sun or the moon?"
Pupil : "The moon".
Teacher : "Why?"
Pupil : "The moon gives us light at night when we need it but the sun gives us light only in the day time when we don't need it".

Teacher : "What do you call a person who keeps on talking when people are no longer interested?"
Pupil : "A teacher".

Teacher : "Now, children, if I saw a man beating a donkey and stopped him,what virtue would I be showing?"
Student : "Brotherly love".