Allah tells us of His kindness towards His servants by subjugating for them
ships on the sea. He makes it easy for them to use ships to serve their
interests, seeking His bounty through trade between one region and another. He
says:
[إِنَّهُ كَانَ
بِكُمْ رَحِيمًا]
(Truly, He is ever Most Merciful towards you.) meaning, He does this for you
out of His grace and mercy towards you.
[وَإِذَا مَسَّكُمُ
الْضُّرُّ فِى الْبَحْرِ ضَلَّ مَن تَدْعُونَ إِلاَ إِيَّاهُ فَلَمَّا نَجَّـكُمْ
إِلَى الْبَرِّ أَعْرَضْتُمْ وَكَانَ الإِنْسَـنُ كَفُورًا ]
(67. And when harm touches you upon the sea, those that you call upon vanish
from you except Him. But when He brings you safe to land, you turn away. And man
is ever ungrateful.)