1:18 wrath. The divine Judge’s righteous retribution and personal revulsion evoked by moral evil.

is revealed. God’s judgment is not limited to the future; His antagonism to sin is already shown in the world. Its effects are visible even now.

ungodliness and unrighteousness. The order may be significant—since moral decay follows theological rebellion. Or Paul may be using the two words together to express one idea, wicked ungodliness.

suppress the truth. It is not that the truth is sought but cannot be found, but rather that, confronted with the truth (which is “clearly perceived,” v. 20), fallen humanity seeks to hinder and obstruct its influence, and is therefore “without excuse” (v. 20). The “excuse” in view is an appeal to ignorance.