ـ الإمامُ عليٌّ (عَلَيهِ الّسَلامُ): ماضي يَومِكَ فائتٌ ، وآتيهِ مُتَّهَمٌ ، ووَقتُكَ مُغتَنَمٌ . 
‪Imam Ali (AS) said, ‘Your yesterday has passed on, your tomorrow is uncertain, and your today is to be taken advantage of.’[Ghurar al-Hikam, no. 9840]