The Exile
يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ ٱتَّقُوا۟ ٱللَّهَ وَلْتَنظُرْ نَفْسٌ مَّا قَدَّمَتْ لِغَدٍ ۖ وَٱتَّقُوا۟ ٱللَّهَ ۚ إِنَّ ٱللَّهَ خَبِيرٌۢ بِمَا تَعْمَلُونَ
O you who have believed, fear Allah. And let every soul look to what it has put forth for tomorrow - and fear Allah. Indeed, Allah is Acquainted with what you do.
Nearby ayahs help place verse 59:18 in sequence and meaning.
كَمَثَلِ ٱلشَّيْطَـٰنِ إِذْ قَالَ لِلْإِنسَـٰنِ ٱكْفُرْ فَلَمَّا كَفَرَ قَالَ إِنِّى بَرِىٓءٌ مِّنكَ إِنِّىٓ أَخَافُ ٱللَّهَ رَبَّ ٱلْعَـٰلَمِينَ
[The hypocrites are] like the example of Satan when he says to man, "Disbelieve." But when he disbelieves, he says, "Indeed, I am disassociated from you. Indeed, I fear Allah, Lord of the worlds."
فَكَانَ عَـٰقِبَتَهُمَآ أَنَّهُمَا فِى ٱلنَّارِ خَـٰلِدَيْنِ فِيهَا ۚ وَذَٰلِكَ جَزَٰٓؤُا۟ ٱلظَّـٰلِمِينَ
So the outcome for both of them is that they will be in the Fire, abiding eternally therein. And that is the recompense of the wrong-doers.
وَلَا تَكُونُوا۟ كَٱلَّذِينَ نَسُوا۟ ٱللَّهَ فَأَنسَىٰهُمْ أَنفُسَهُمْ ۚ أُو۟لَـٰٓئِكَ هُمُ ٱلْفَـٰسِقُونَ
And be not like those who forgot Allah, so He made them forget themselves. Those are the defiantly disobedient.
لَا يَسْتَوِىٓ أَصْحَـٰبُ ٱلنَّارِ وَأَصْحَـٰبُ ٱلْجَنَّةِ ۚ أَصْحَـٰبُ ٱلْجَنَّةِ هُمُ ٱلْفَآئِزُونَ
Not equal are the companions of the Fire and the companions of Paradise. The companions of Paradise - they are the attainers [of success].