An important advice about preserving time and not wasting it. How does a person waste one's heart? How does one waste one's time? It is as Ibn al-Qayyim said: "Prefering the dunyā over the hereafter and busying oneself with too many wants and hopes"
Allāh says: ‘‘And your Lord says: Call upon Me and I will, respond to your supplication.’’ [Sūrah al-Ghāfir, 40:60] So why is it that a person’s duʿāʾʾʾʾ (supplication) is sometimes unanswered?