"The heavens declare the glory of God;
And the firmament shows His handiwork.
Day unto day utters speech,
And night unto night reveals knowledge.
There is no speech nor language
Where their voice is not heard.
Their line has gone out through all the earth,
And their words to the end of the world."
Famously, Psalm 14:1 states:
The fool has said in his heart,
"There is no God."
That psalm then goes on to explain that the core issue with disbelief is not the lack of evidence, but rather that the non-believer just wants to live a sinful life. In other words, a belief in God is "inconvenient" to their lifestyle of choice. For them, it is easier to live in willful ignorance and close their hearts and minds away from the evidence.