إِنَّمَا يَعْمُرُ مَسَاجِدَ اللّهِ مَنْ امَنَ بِاللّهِ وَالْيَوْمِ الاخِرِ
The Masjids of Allah shall be maintained only by those who believe in Allah and the Last Day.
Therefore, Allah testifies to the faith of those who maintain the Masjids.
Abdur-Razzaq narrated that `Amr bin Maymun Al-Awdi said,
"I met the Companions of the Prophet and they were saying, `The Masjids are the Houses of Allah on the earth. It is a promise from Allah that He is generous to those who visit Him in the Masjids."
Allah said next,
وَأَقَامَ الصَّلَةَ
perform the Salah,
one of the major acts of worship practiced by the body,
وَاتَى الزَّكَاةَ
and give the Zakah,
which is the best act that benefits other people,
وَلَمْ يَخْشَ إِلاَّ اللّهَ
and fear none but Allah,
they fear only Allah, the Exalted, and none else,
فَعَسَى أُوْلَـيِكَ أَن يَكُونُواْ مِنَ الْمُهْتَدِينَ
It is they who are on true guidance.
Ali bin Abi Talhah said that Ibn Abbas said about Allah's statement,
إِنَّمَا يَعْمُرُ مَسَاجِدَ اللّهِ مَنْ امَنَ بِاللّهِ وَالْيَوْمِ الاخِرِ
(The Masjids of Allah shall be maintained only by those who believe in Allah and the Last Day),
"He who singles out Allah (in worship), has faith in the Last Day."
And he said;
"He who believes in what Allah has revealed,
وَأَقَامَ الصَّلَةَ
(perform the Salah), establishes the five daily prayers,
وَلَمْ يَخْشَ إِلاَّ اللّهَ
(and fear none but Allah), worships Allah alone,
فَعَسَى أُوْلَـيِكَ أَن يَكُونُواْ مِنَ الْمُهْتَدِينَ
it may be they who are on true guidance.
Allah says, `It is they who are the successful ones in truth.'
Similarly, Allah said to His Prophet,
عَسَى أَن يَبْعَثَكَ رَبُّكَ مَقَاماً مَّحْمُودًا
It may be that your Lord will raise you to Maqam Mahmud, (17;79)
Allah says here,
`Your Lord (O Muhammad) shall grant you a station of praise, that is, the intercession (on the Day of Resurrection).'
Every `might' in the Qur'an means `shall'.