Following the examples of Muhammad and the past prophets
Nahj al-Balāgha|Volume 1|Book 1|Chapter 160
فَمَنْ فَرَّغَ قَلْبَهُ، وَأَعْمَلَ فِكْرَهُ، لِيَعْلَمَ كَيْفَ أَقَمْتَ عَرْشَكَ، وَكَيْفَ ذَرَأْتَ خَلْقَكَ، وَكَيْفَ عَلَّقْتَ فِي الْهَوَاءِ سمَـاوَاتِكَ، وَكَيْفَ مَدَدْتَ عَلى مَوْرِ الْمَاءِ أَرْضَكَ، رَجَعَ طَرْفُهُ حَسِيراً، وَعَقْلُهُ مَبْهُوراً، وَسَمْعُهُ وَالَهِاً، وَفِكْرُهُ حَائِراً.
He who frees his heart (from all other engagements) and exerts his thinking in order to know how Thou established Thy throne, how Thou created Thy creatures, how Thou suspended the air in Thy skies and how Thou spread Thy earth on the waves of water, his eyes would return tired, his intelligence defeated, his ears eager and his thinking awander.