Atheist logic: “If your God was real, He wouldn’t need you to argue His existence.”
Christian response,
God has made His reality known via what He has made-created in Nature and placed before our eyes; God has made His reality known through the Incarnation of God in Jesus Christ, the Living Word, who walked among us for 33.5-years; God has made His reality known via the work of God the Holy Spirit via the written word of God carefully preserved down through history for our knowledge-edification; therefore, those who reject these forms of empirical evidence are “without excuse” (Romans 1:18-32).
From Eternity past, God has desired intimacy with His created beings, both angelic and human, and that relationship is one where God’s servants are gifted to serve Him in faithfulness and obedience and God lavishes those who serve Him with His Spirit whose indwelling presence literally makes life worth living. So then, God has so ordained-decreed that His will and His message and His covenants would be proclaimed by those who love Him and trust in Him as Lord via intimate relationship; this is our Lord’s doing and He is God over all; therefore, the naysayers simply lack knowledge of the spiritual and don’t know our God or His will for life in Time or Eternity.