هُوَ الَّذِي يُسَيِّرُكُمْ فِي الْبَرِّ وَالْبَحْرِ ۖ حَتَّىٰ إِذَا كُنتُمْ فِي الْفُلْكِ وَجَرَيْنَ بِهِم بِرِيحٍ طَيِّبَةٍ وَفَرِحُوا بِهَا جَاءَتْهَا رِيحٌ عَاصِفٌ وَجَاءَهُمُ الْمَوْجُ مِن كُلِّ مَكَانٍ وَظَنُّوا أَنَّهُمْ أُحِيطَ بِهِمْ ۙ دَعَوُا اللَّهَ مُخْلِصِينَ لَهُ الدِّينَ لَئِنْ أَنجَيْتَنَا مِنْ هَٰذِهِ لَنَكُونَنَّ مِنَ الشَّاكِرِينَ (22)
(10:22) He it is Who enables you to journey through the land and the sea. And so it happens that when you have boarded the ships and they set sail with a favourable wind, and the passengers rejoice at the pleasant voyage, then suddenly a fierce gale appears, and wave upon wave surges upon them from every side, and people believe that they are surrounded from all directions, and all of them cry out to Allah in full sincerity of faith: 'If You deliver us from this we shall surely be thankful. *31
*31). This particular 'sign' which testifies to the truth of belief in the One True God is innate in human nature and hence can be witnessed by all. However, as long as the means of self-indulgence are plentiful, man tends to forget God and exults in his worldly enjoyment. But as soon as the means which have led him to his worldly efflorescence are gone, even the most die-hard polytheists and atheists begin to appreciate this innate sign testifying that there indeed is a God Who has His firm grip over the universe, and that it is the One True God alone Who is all-powerful and Who holds sway over all that exists. (For details see Towards Understanding the Qur'an, vol. II, al-An 'am 6, n. 29, pp. 231-3-Ed.)