Simplify the following text for a Grade 7 native English-speaking person.
Original: The official position as maintained in Kim Jong-il â s â The Juche Philosophy Is an Original Revolutionary Philosophyâ ( 1996 ) is that Juche is a completely new ideology created by Kim Il-sung , who does not depend on the Marxist classics . As a result , the North Korean Constitution has no mention of Marxism-Leninism , but rather occupies its entire preamble with statements about Kim Il-sung .
Simplified: Juche is the group of ideas professed by North Korean leaders Kim Il-Sung and Kim Jong-Il .