Is a repentant young man's return to a sin he has habitually committed after every repentance, considered insistence on sin, and what should he do?

The young man must sincerely repent and immediately cease the sin, and not despair if he falls into it again. Instead, he should hasten to renew his repentance, for frequent repentance is praiseworthy. To achieve righteousness and steadfastness, he should supplicate with persistence for firmness in religion, avoid places of disobedience and bad company, and associate with righteous, committed youth.