Being the Good news to student.
When the arm of the Lord is being stretch to every institution like school. The teacher preach the good tidings to the student. Making known to the student the counsel or the eternal plan of God about their life or destiny.
When Joseph through dreams foresaw his destiny or purpose in life and informed his parent and his brethren. His brethren decide to kill him and other suggested that they should sell him to Egyptians to be a slave over there.
But God being rich in Mercy and Glory turn the one who destiny was turn to be slave by His brethren and it was not in intent of God's plan for Joseph, used the same methods and procedure or turn their wicked ways to be proper.
God uses what the world has rejected to glorifies himself. I want to remind ourselves that no matter what situations in life, God will turn the same situations for our good. So dear Christian let us wait upon the Lord.