Says Allah, Azzah Wa-Jallah:--
"...SEEK THE FORGIVENESS OF YOUR LORD, AND TURN TO HIM IN REPENTANCE,
THAT HE MAY GRANT YOU GOOD ENJOYMENT, FOR A TERM APPOINTED..." (11:3)
Tawbah is not rooted in a simplistic interpretation of the mandates of Islamic revelation, but in a particular understanding of the spirirual-phychological effects of sin. The human soul is a theater for the struggle between the luminous heart and the dense lower self. While the former is a positive force which inclines towards Allah, the latter is a negative force which turns man in the direction of his ego and disobedience.
Since man is pulled by these 2 opposing tendencies, the task of the spiritual seeker is to overcome the negative impulses of the lower soul and constantly return to the higher self and to Allahu, Azzah Wa-Jallah, through the regenerative and trans formative power of TAWBAH (repentance)... do recite the ISTIGHFAR constantly.