You cry out in terror over what you perceive as a demon in your house, and your words reveal a heart stretched thin with fear, fluttering like those open curtains you mention. Yet mark this: the very cry, "if you don't help me Jesus then I won't do it myself," betrays a soul that has in part looked to its own strength and found it wanting. Salvation, and deliverance from any dark power, is of the Lord, and must come from the right hand of the Most High; it cannot in any degree, or in any measure, come from yourself. You have done well to call upon Jesus, for He alone "hath delivered us from the power of darkness," but you must now leave the doing entirely with Him. Cease from the rambling, fidgeting effort of self; stay at home in your closet with your God, and you shall find peace much better there than by peering at curtains and measuring shadows. Lay your case before Him, spread it out with all the arguments you can muster, then trust Him to bring you forth, even as Israel of old, He brought them forth, and they did not share the honor of their deliverance with their own hand.
Why this dread that the demon lingers or might return? Fear is weakening; it dishonors God. Do you think the arm which piled the heavens and sustains the pillars of the earth can be palsied by a foul spirit? If you are hidden with Christ, your life is beyond the molestation of hell, for He that is mighty on his knees is mighty everywhere. Did you wrestle in prayer at your own Jabbok? Then expect an Esau to fall on your neck, not a foe to stand in your way. I know well times of unanswered prayer, when the heart is full of perplexity and seems to get no reply; yet the very fact that you seek Christ, even with trembling, even with little faith you can feel, proves the promise is yours. Take it home, suck out its juice: "They that know thy name will put their trust in thee: for thou, Lord, hast not forsaken them that seek thee." Do not fear that you will be destroyed through your dread of not being saved; a great host of souls are more harmed by that chill despair than by the sin itself.
Consider the matter doctrinally and experimentally. Deliverance from the power of sin, and from the harassments of the evil one, is as much the work of God as deliverance from the guilt of sin. You must look to your heavenly Father, altogether and alone, for sanctification and protection. And if you can look back and see even a spark of hatred for the darkness, a weary sighing under bondage, then take heart: the clock of mercy struck in heaven the hour of your deliverance when the Lamb was slain. Nobody would have thought of that way, the ransom of a sinner by blood, if God had not thought of it; and He who found a ransom will not leave you captive to a mere intruder in your home. The foul-mouthed demon of blasphemy, the black demon of vice, whatever held you, every stronger rope it wound about you was snapped when the eternal purpose decreed it. Has He delivered you from the pit? Then He will certainly help you in your daily troubles, this skirmish with fear over your dining room. If He gave His own dear Son to put away your sin, will He not give you peace in your own house?
Therefore, imitate Jacob's model prayer in humility of spirit. Acknowledge your own nothingness, leave no room for self-conceit which tears the chariot wheels from prayer so that it drags heavily and cannot move an inch. Then plead the promise: "Fear not, for I will help thee." God says it, and His Word silences the archers. Your conduct after this deliverance must be to declare the works of the Lord. You shall not die, but live, and tell how you were frozen with fear, laid out as dead, when suddenly the Lord's face shone in and all darkness fled. The demon is not sovereign over the house where the blood of the Passover Lamb is seen on the doorpost. Rise, then, from your despondency, giving no atom of the honor to yourself, it is free grace alone, and open those curtains wide, not to search for a specter, but to let the light of the Sun of Righteousness flood every corner, singing, "God is the Lord, which has showed us light." You shall get safely home, and your dwelling shall be a Goshen of peace, not because you are strong, but because He has said, "I have found a ransom."