Since the Lord created the earth and made it evident to man that there is a Creator then man is without excuse for not acknowledging the Creator. All atheism and agnosticism is a result of not coming to the light that God has given to man. The light of God begins through creation and when man comes to God then the Lord gives him more light.
Romans 1:19,20 because that which is known about God is evident within them; for God made it evident to them. For since the creation of the world His invisible attributes, His eternal power and divine nature, have been clearly seen, being understood through what has been made, so that they are without excuse.
Man is without excuse because the Lord created man to know Him and made it evident within Him. However, if man does not turn to His Creator then his foolish heart becomes darkened.
Romans 1:21 For even though they knew God, they did not honor Him as God or give thanks, but they became futile in their speculations, and their foolish heart was darkened.
God made man to know Him but when we do not honor Him or thank Him then we start speculating about God. Often it will begin with “My God would not…”. Any speculation about God will only bring greater darkness to the foolish heart that does not turn to God. Finally, the one who does not acknowledge God, honor Him or thank Him will cease to even believe that He exists.
Romans 1:22,23 Professing to be wise, they became fools,and exchanged the glory of the incorruptible God for an image in the form of corruptible man and of birds and four-footed animals and crawling creatures.
The person who turns from God will think that he himself is wise. Once he thinks of himself as wise then he has even less hope than when he was only a fool and turned from God. Now, the wise in his own eyes person will exchange the glory of being made in God’s image and think that he is made in the image of creation, which is a summation of evolution.
Proverbs 26:12 Do you see a man wise in his own eyes?
There is more hope for a fool than for him.
Instructions To A Young Life 