وَأَسِرُّوا قَوْلَكُمْ أَوِ اجْهَرُوا بِهِ ۖ إِنَّهُ عَلِيمٌ بِذَاتِ الصُّدُورِ (13)
(67:13) Whether you speak in secrecy or aloud, (it is all the same to Allah). He even knows the secrets that lie hidden in the breasts of people. *20
*20) The address is to all human beings, whether they are believers or unbelievers. For the believer it contains the admonition that while living his life in the world he should always remember that not only his open and hidden deeds but even his secret intentions and innermost thoughts are not hidden from Allah; and for the unbeliever the warning that he may do whatever he may please fearless of God, but nothing that he does can remain un-noticed and unseen by Him.