Psalm 53 reveals the foolishness of atheism, and the last thing that the psalm says is,
“Oh, that the salvation of Israel would come out of Zion! When God brings back the captivity of His people, let Jacob rejoice and Israel be glad” (Psalm 53:6).
Atheists deny God’s existence, because they cannot see Him, but they can see His work, and when He works among His people, atheists can see that also.
Therefore, let us be like the psalmist who prayed that God would work among His people, and pray for God to work in the church that atheists might see the foolishness of their position, repent, and join us.