وَٱلْفُرْقَانِ ۚ فَمَن شَهِدَ مِنكُمُ ٱلشَّهْرَ فَلْيَصُمْهُ ۖ وَمَن كَانَ مَرِيضًا أَوْ عَلَىٰ سَفَرٍ فَعِدَّةٌ مِّنْ أَيَّامٍ أُخَرَ ۗ يُرِيدُ ٱللَّهُ بِكُمُ ٱلْيُسْرَ وَلَا يُرِيدُ بِكُمُ ٱلْعُسْرَ وَلِتُكْمِلُوا۟ ٱلْعِدَّةَ وَلِتُكَبِّرُوا۟ ٱللَّهَ عَلَىٰ مَا هَدَىٰكُمْ وَلَعَلَّكُمْ تَشْكُرُونَ
The month of Ramazan[is that] in which was revealed the Qur’an, a guidance for the people and clear proofs of guidance and criterion. So whoever sights [the new moon of] the month, let him fast it; and whoever is ill or on a journey – then an equal number of other days. Allah intends for you ease and does not intend for you hardship and [wants] for you to complete the period and to glorify Allah for that [to] which He has guided you; and perhaps you will be grateful.
Surah Baqarah Ayat 185.

In another narration, the Prophet ^PBUH said:
اللَّهُمَّ أَهِلَّهُ عَلَيْنَا بِالْأَمْنِ وَالْإِيمَانِ وَالسَّلَامَةِ وَالْإِسْلَامِ وَالتَّوْفِيقِ لِمَا تُحِبُّ وَتَرْضَى رَبُّنَا وَرَبُّكَ اللَّهُ
O Allah, bring it over us with safety and faith, security and Islam, guidance to what You love and is pleasing to You. Our Lord and your Lord is Allah.
Source: Ṣaḥīḥ Ibn Ḥibbān 888

Our beloved Imam, The Promised Mehdi ^SAS said that-Makhluq (people created by Allah) looks at the (crescent moon) and rejoices. It should not rejoice. In fact, they should cry and feel sorry that life is being wasted and death is coming closer. Why do the people not curse (malamat) themselves? Why do they not repent?

Ameer-Ul-Muminin Hazrat Ali ^Rz. is narrated to have said-“Whoever wants to be a leader should educate himself before educating others. Before preaching to others he should first practice himself. Whoever educates himself and improves his own morals is superior to the man who tries to teach and train others.”