﴿ وَحَفِظْنَٰهَا مِن كُلِّ شَيْطَٰنٍۢ رَّجِيمٍ ﴾

“and We have made them secure against every satanic force accursed -”

Satan too has been allowed to settle along with human beings on the earth. Here, he enjoys full freedom to go wherever he likes. But in God’s world beyond this earth, insurmountable hindrances have been placed in the path of Satan, so that he is unable to go beyond a certain limit.