Imam Ali (AS) said, Increase your gladness for that which you have sent forth of good deeds and [increase] your sadness for that which you have missed from it.
الإمامُ عليٌّ (عَلَيهِ الّسَلامُ) : أكثِرْ سُرُورَكَ على ما قَدَّمْتَ مِنَ الخَيرِ وَ حُزْنَكَ على ما فاتَ مِنْهُ