Romans 1:18-20

For God in heaven unveils his holy anger breaking forth against every form of sin, both toward ungodliness that lives in hearts and evil actions. For the wickedness of humanity deliberately smothers the truth and keeps people from acknowledging the truth about God. In reality, the truth of God is known instinctively, for God has embedded this knowledge inside every human heart. Opposition to truth cannot be excused on the basis of ignorance, because from the creation of the world, the invisible qualities of God’s nature have been made visible, such as his eternal power and transcendence. He has made his wonderful attributes easily perceived, for seeing the visible makes us understand the invisible. So then, this leaves everyone without excuse.