Disbelief is disappointment [and failure]

الْكُفْرُ خِذْلَانٌ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

Ascribing partners [to Allah] is disbelief

الْإِشْرَاكُ كُفْرٌ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

Disbelief is loss

الْكُفْرُ مَغْرَمٌ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

    Disbelief is wiped out by faith

الْكُفْرُ يَمْحَاهُ [يَمْحُوهُ‏] الْإِيمَانُ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

The most harmful thing is polytheism

أَضَرُّ شَيْ‏ءٍ الشِّرْكُ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

The cause of destruction is polytheism

سَبَبُ الْهَلَاكِ الشِّرْكُ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

The final end of the disbeliever is hellfire

غَايَةُ الْكَافِرِ النَّارُ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

The disbeliever is an immoral, ignorant person

الْكَافِرُ فَاجِرٌ جَاهِلٌ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

The disbeliever is ill-tempered and has an evil manner

الْكَافِرُ شَرِسُ الْخَلِيقَةِ سَيِّئُ الطَّرِيقَةِ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

The disbeliever is a misguiding deceiver, hard-hearted, [and] perfidious

الْكَافِرُ خَبٌّ ضَبٌّ جَافٍ [خاف‏] خَائِنٌ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

The disbeliever is a vile deceiver, perfidious, deluded by his ignorance and duped

الْكَافِرُ خَبٌّ لَئِيمٌ خَئُونٌ مَغْرُورٌ بِجَهْلِهِ مَغْبُونٌ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

For the disbeliever, this world is his Paradise, the transient is what he strives for, death is [the cause of] his wretchedness and hellfire is his final end

الْكَافِرُ الدُّنْيَا جَنَّتُهُ وَالْعَاجِلَةُ هِمَّتُهُ وَالْمَوْتُ شَقَاوَتُهُ وَالنَّارُ غَايَتُهُ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech

The concern of the disbeliever is for his [life in this] world, his efforts are for the transient [pleasures] and his goal is [fulfilling] his lust

هَمُّ الْكَافِرِ لِدُنْيَاهُ وَسَعْيُهُ لِعَاجِلَتِهِ وَغَايَتُهُ شَهْوَتُهُ

Source : Ghurar Al-Hikam Wa Durar Al-Kalim, Exalted Aphorisms And Pearls Of Speech