“And I must further explain, your Godliness, the difference between the operations of the Holy Spirit Who dwells mystically in the hearts of those who believe in our Lord God and Savior Jesus Christ and the operations of the darkness of sin which at the suggestion and instigation of the devil, acts predatorily in us. The Spirit of God reminds us of the words of our Lord Jesus Christ and always acts triumphantly with Him, gladdening our hearts and guiding our steps into the way of peace, while the false, diabolical spirit reasons in the opposite way to Christ, and its actions in us are rebellious, stubborn, and full of the lust of the flesh, the lust of the eyes and the pride of life. “And whoever lives and believes in Me will never die” (John 11:26). He who has the grace of the Holy Spirit in reward for right faith in Christ, even if on account of human frailty his soul were to die for some sin or other, yet he will not die for ever, but he will be raised by the grace of our Lord Jesus Christ…

On Acquisition of the Holy Spirit by Saint Seraphim of Sarov