While the Gülenist Terror Organization (FETÖ) denies involvement in the recent coup attempt, Fethullah Gülen, the controversial leader of FETÖ, has secretly been instructing his followers to slowly infiltrate Turkish state institutions to take complete control over the system, according to video recordings of his sermons from the 1980s.

In the video, Gülen tells his followers that their goal is to "advance so much" so that they can infiltrate the vital points of the civil service and judiciary, which will 'guarantee and secure their future.'

"The presence of our friends in the judiciary, civil service and other vital institutions should not be seen as individual obligations" Gülen tells his followers and suggests that they learn all tricks of the trade to ensure their future.

Gülen describes one of the goals of their movement as advancing without making it obvious until they have a grasp of the system.

"It is necessary for us to be extremely careful and cautious" Gülen says and adds that whoever wants to serve his movement should act like a diplomat who can manage the world and act cautiously in order to not raise suspicion and expose their identity.

He also says that each step taken before taking control of constitutional institutions is 'too early' and also tells his followers to keep his words a secret.

"I know that the same way you throw your juice boxes into the garbage bin when you walk out of this room, you will also throw these remarks into garbage" he said.

FETÖ, also referred to as the Gülen Movement, operates on a secretive structure, with leaders and representatives at the district, provincial and nation-wide levels who both act as insiders and decision-makers steering the movement.

They are accused of being behind the July 15 coup attempt, when over 240 people were killed and over a thousand were injured by pro-coup Gülenist soldiers within the military.

Gülen is among Turkey's most wanted, with the country exerting a tremendous effort to obtain an international arrest warrant for him. He lives in a compound owned by his movement in Saylorsburg, Pennsylvania. Ankara is seeking to secure his extradition from the U.S and has officially submitted the documents for extradition earlier this week.

Gülenists run a vast network of schools around the globe, but are primarily invested in charter schools in the U.S., which receive government funding but operate independent of the public school system. Dozens of schools associated with Gülenists are facing criticism and are under investigation over the alleged misuse of federal grants and the abuse of a visa scheme being used to funnel foreign teachers into charter schools who are brought from Turkey to live in the U.S.

FETÖ, which has seen its members and sympathizers purged from state institutions, including the police and judiciary, was designated by authorities as a national threat, a classification for terrorist organizations.

Gülenists are accused of illegally wiretapping thousands of people, from the prime minister to journalists and other prominent figures. They are also accused of imprisoning critics or anyone seen as an obstacle to the movementtarget="_blank"'>