If a Muslim lived through Ramadaaan and spent its days in fasting and its nights in prayer, and in that month he accustomed himself to doing acts of good, then he must continue to remain upon this obedience to Allaah at all times (after that). This is the true state of the servant (‘abd), for indeed, the Lord of the months is One and He is ever watchful and witnessing His servants at all times.
Indeed, steadfastness after Ramadaan and the rectification of one’s statements and actions are the greatest signs that one has gained benefit from the month of Ramadaan and that he struggled in obedience. They are tokens of acceptance and signs of success.
Furthermore, the deeds of a servant do not come to an end with the end of a month and the beginning of another. Rather they continue and extend until one reaches death, for Allaah says: “And worship your Lord until the certainty (i.e., death) comes to you.”