Hadith: The strong believer is better and dearer to Allah than the weak believer, and there is good in both

عَنْ أَبِي هُرَيْرَةَ رضي الله عنه قَالَ: قَالَ رَسُولُ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ:
«الْمُؤْمِنُ الْقَوِيُّ، خَيْرٌ وَأَحَبُّ إِلَى اللهِ مِنَ الْمُؤْمِنِ الضَّعِيفِ، وَفِي كُلٍّ خَيْرٌ، احْرِصْ عَلَى مَا يَنْفَعُكَ، وَاسْتَعِنْ بِاللهِ وَلَا تَعْجَزْ، وَإِنْ أَصَابَكَ شَيْءٌ، فَلَا تَقُلْ لَوْ أَنِّي فَعَلْتُ كَانَ كَذَا وَكَذَا، وَلَكِنْ قُلْ قَدَرُ اللهِ وَمَا شَاءَ فَعَلَ، فَإِنَّ (لَوْ) تَفْتَحُ عَمَلَ الشَّيْطَانِ».
[صحيح] - [رواه مسلم] - [صحيح مسلم: 2664]

Abu Hurayrah (may Allah be pleased with him) reported that the Messenger of Allah (may Allah's peace and blessings be upon him) said:
"The strong believer is better and dearer to Allah than the weak believer, and there is good in both. Adhere to whatever brings you benefit, seek the help of Allah, and do not feel helpless. If something befalls you, do not say: 'Had I done such-and-such, it would have been such-and-such;' rather, say: 'Allah has decreed, and whatever He wills, He does.' Indeed, 'if' opens the way before the devil to act."
[Authentic hadith] - [Narrated by Muslim] - [Sahih Muslim - 2664]

Explanation

The Prophet (may Allah's peace and blessings be upon him) clarifies that the believer is good from all aspects; however, the believer who is strong in his faith, resolve, property, and other aspects of strength is better and dearer to Allah Almighty than the weak believer. Then, the Prophet (may Allah's peace and blessings be upon him) advised the believer to utilize the available means in what brings him benefit in his worldly affairs and the affairs of the Hereafter, along with depending upon Allah Almighty, seeking His help, and relying upon Him. The Prophet (may Allah's peace and blessings be upon him), then, forbids inability, indolence, and slackness in doing what brings benefit in both abodes. If the believer works hard and utilizes the available means while seeking Allah's help and asking Him for goodness, then he should do nothing but entrust all of his affairs to Allah while knowing that Allah's choice is the best. If some calamity befalls him after that, he should not say: "Had I done such-and-such, it would have been such-and-such." "Indeed, 'if' opens the way before the devil to act" in objecting to the divine decree and lamenting what has been missed. Instead, one should submissively and contentedly say: "Allah has decreed, and whatever He wills, He does." Everything happens in compliance with Allah's will, as He does what He wants and nothing can repel His predestination or reverse His decree.