The July 21 bomb plot trial has heard the contents of what the prosecution says is a suicide note written by the one of the defendants.
The six deny charges of conspiracy to murder and cause explosions
Ramzi Mohammed wrote of being admitted "to the highest station in paradise", prosecutor Nigel Sweeney QC said.
It was also thought the plotters made a suicide video to explain their reasons for the bombings, Mr Sweeney added.
Mr Mohammed and five other men deny conspiracy to murder and conspiracy to cause explosions in London.
The note, allegedly signed by Mr Mohammed and found in his friend's flat, begins with a quote from the Koran.
"Verily he [Allah] grants martyrdom, whomever he wishes," it continues.
"Secondly, my family don't cry for. But instead rejoice in happiness and love.
"What I have done [is] for the sake of Allah for he loves those who fight in his sake."
Muktar Said Ibrahim, 28, from Stoke Newington, north London
Ramzi Mohammed, 25, from North Kensington, west London
Yassin Omar, 26, from New Southgate, north London
Hussein Osman, 28, of no fixed address
Manfo Kwaku Asiedu, 33, of no fixed address
Adel Yahya, 24, of High Road, Tottenham, north London
Mr Sweeney told the jury how Mr Mohammed urged his family to "hold tight for the rope of Allah and don't let go" and to pray "five daily prayers so that you may be saved from hell".
Mr Mohammed also called on his two sons to "be good Muslims... and you shall see me again in paradise, God willing," Mr Sweeney added.
Mr Sweeney also said that, when police raided Mr Mohammed's flat in Dalgarno Gardens, North Kensington - eight days after the alleged attempted bombings on the London public transport network - they found a camera tripod along with an Islamic headband and a wall banner containing Arabic writing.
When fellow accused Hussein Osman was arrested in Rome, he was in possession of a digital camera which had had its memory card removed, Mr Sweeney added.
Mr Sweeney claimed that when the bombs failed to explode on July 21 2005, the defendants realised they had to cover their tracks and dispose of the video.
Mr Osman later told police in Italy that it was not an attempted suicide bombing but simply a hoax designed to "frighten people" and make a political point.