Based on a lecture by Ash-Shaykh Abdul-Muhsin ibn Hamad al-Abbaad on Shawwaal 16, 1390 A.H.
As the days of Ramadaan elapse, the Muslim finds one of life’s opportunities presented before him. It is an opportunity which he may reach once again, or perhaps his decreed fate will overtake him before he reaches it. Nonetheless, what is most important is that this opportunity is utilized by filling it with acts of obedience and remaining far away from sins. Even more important is remaining consistent in doing those things as well, since one of the rewards for a good deed is being guided to perform other good deeds afterwards. In a similar way, one of the punishments for an evil deed is being left to perform other evil deeds after it. Therefore, let us consider the case of the Muslim who wishes good for himself and has been granted the fortune of reaching this blessed month and using it fully in the obedience of his Lord who created him for worship and showered blessings upon him, both apparent and hidden. His soul would find rest in performing righteous actions and his heart would find itself moving towards the hereafter, which is the final destination. It is there that nothing will benefit a person except what his own hands have sent forth, on the day when neither wealth nor offspring will avail, except him who brings to Allaah a clean heart. During those blessed days of Ramadaan, the soul should have accustomed itself to obedience while hoping for what Allaah has in store, and restraining itself out of fear from His punishment. Undoubtedly, once this has been done, the benefit which the Muslim gleans and the lesson he acquires is that he must subsequently continue to perform good deeds and avoid sins. This is so since Allaah has commanded His servants to worship Him for the entire duration of their lives.
which means, And worship your Lord until the certainty (of death) comes to you.[Soorah al-Hijr (15):99]
which means, O you who believe! Have Taqwaa of Allaah as is rightfully due to Him.
And do not die except in a state of Islaam, with complete submission to Allaah. [Soorah Aali Imraan (3):102]
Once the Muslim has tasted the sweetness of obedience during the month of fasting, it is not proper for him to replace it with the bitterness of disobedience. Additionally, once he has overpowered his enemy in the month of fasting, in is not fitting to bring joy to him during Shawwaal and the months that follow. If a Muslim truly wants good for himself, he must not stop performing good deeds with the departure of the month of fasting. Doing so would be like substituting a time that is better for that which is lower in rank. During Ramadaan, as well as at all other times, Allaah is Living and does not die. He sustains and protects all His creation, and does not sleep. The deeds of the day ascend to Him before those of the night, just as the actions of the night ascend before those of the day, and He does not wrong anyone in the least.
which means, And if there is any good done, He doubles it and grants a great reward from
Himself. [Soorah an-Nisaa’ (4):40]