48. " and he will touch him the book, and the wisdom,
and the torah and the evangel."

commentary:
in commentary books provided by both main islamic schools of
thought, it is cited that the purpose of the qur'anic phrase `he will
teach the book' is `writing, and teaching how to write' and the purpose of
/hikmah/ (wisdom) is being conversant unto the merits, effects,
goodnesses and evils of things, deeds morals and beliefs, whether those
things belong to this world or to the coming world

explanations:
1. one of the principles and conditions of leadership is knowing
the necessary things - being conversant unto science, wisdom, and the
contents of the heavenly books.

"and he will teach him the book, and the wisdom,
and the torah and the evangel."

2. at any time, the leader of a community should have
conversance of the former incidents and laws (jesus (a.s.) was taught
torah which was from the time of moses.)