How many nights have you remained awake repeating science and poring over books, and have denied yourself sleep. I do not know what the purpose of it… - Al-Ghazali

من جعل الحق وقفاً على واحد من النُظّار بعينه، فهو إلى الكفر والتناقض أقرب

A person of good character is he who is modest, says little, causes little trouble, speaks the truth, seeks the good, worships much, has few faults, meddles little, desires the good for all, and does good works for all. He is compassionate, dignified, measured, patient, content, grateful, sympathetic, friendly, abstinent, and not greedy. He does not use foul language, nor does he exhibit haste, nor does he harbor hatred in his heart. He is not envious. He is candid, well-spoken, and his friendship and enmity, his anger and his pleasure are for the sake of God Most High and nothing more.

Just as you have taken returning to sins as a habit, then also take returning to tawba as a habit, because through tawba you expiate your past sins, and it is very possible that you may have the fortune to die while in a state of tawba.