﴿ وَمَا يَسْتَوِى ٱلْبَحْرَانِ هَٰذَا عَذْبٌۭ فُرَاتٌۭ سَآئِغٌۭ شَرَابُهُۥ وَهَٰذَا مِلْحٌ أُجَاجٌۭ ۖ وَمِن كُلٍّۢ تَأْكُلُونَ لَحْمًۭا طَرِيًّۭا وَتَسْتَخْرِجُونَ حِلْيَةًۭ تَلْبَسُونَهَا ۖ وَتَرَى ٱلْفُلْكَ فِيهِ مَوَاخِرَ لِتَبْتَغُوا۟ مِن فَضْلِهِۦ وَلَعَلَّكُمْ تَشْكُرُونَ ﴾

“[Easy is it for Him to create likeness and variety:] thus, the two great bodies of water [on earth] are not alike the one sweet, thirst-allaying, pleasant to drink, and the other salty and bitter: and yet, from either of them do you eat fresh meat, and [from either] you take gems which you may wear; and on either thou canst see ships ploughing through the waves, so that you might [be able to] go forth in quest of some of His bounty, and thus have cause to be grateful.”

There is a large store of water on the earth—salt water in the oceans and seas, and fresh water in rivers, lakes and springs. This water is the source of innumerable advantages for man. It is used for drinking and irrigation. The creatures which live in water provide valuable food for man. The oceans and seas, spread over three-fourths of the Earth enable transportation and form a vast storehouse of valuable objects like pearls, mineral ores, etc. God causes the earth to revolve around the sun and rotate on its axis in a regulated manner, thereby causing the seasons, and the alternation of day and night. There are similar innumerable arrangements which have been brought into being by the all-powerful God. As such, who else is there other than God who deserves man’s utmost gratitude? It is God with His unfathomable powers who can fulfill the needs of man, and not those imaginary gods who possess absolutely no powers.