That is not always true. There are people out there that simply do not perceive God.
I should have added, if one is sincerely searching for God then they have already found God.
“If you truly want to find God, that desire is in itself evidence that you have already found him. Your trouble is not that you cannot find God, for the Father has already found you; your trouble is simply that you do not know God. Have you not read in the Prophet Jeremiah, `You shall seek me and find me when you shall search for me with all your heart’? And again, does not this same prophet say: `And I will give you a heart to know me, that I am the Lord, and you shall belong to my people, and I will be your God’? And have you not also read in the
Scriptures where it says: `He looks down upon men, and if any will say: I have sinned and perverted that which was right, and it profited me not, then will God deliver that man’s soul from darkness, and he shall see the light’?” Jesus of the Urantia Book
IMOP many so called Atheist have a fundamental, generic concept of God deep within themselves. It is this idea of God that they juxtapose against concepts presented in the various religious dogma and by religionists themselves. They use the criticisms of religion as an excuse for their own indolence.