Belief in the gap opens the scriptures up to a wonderful spiritual application. We will close with this application.

Creation 

Just as the heaven and the earth began with the creation of God, so man began with God forming him of the dust of the ground and breathing into his nostrils the breath of life (Genesis 2:7And the LORD God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul.
See All...). He was created in perfection, without sin, in fellowship with God, and in service to God. Because of his unbroken fellowship with God, his orientation was toward heaven—just as God ordered to create the “heaven and the earth,” not the “earth and the heaven.”  His outlook could be no better. The Garden of Eden was placed at his disposal and he was given a help meet for him. God even checked up on him in person on a daily basis. What a wonderful existence!

Sin and Destruction 

Then, just as Genesis 1:2And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.
See All... describes a scene of destruction that can only be explained as the result of judgment, so man fell from his exalted position with God by the eating of the forbidden fruit. His condition spiritually matches the condition of the earth at this time. 

• His life is without form. He has no true purpose or direction. He wanders about aimlessly trying to find a purpose that is not there.
• His life is void. It is empty and vain. It lacks the only thing that can give true life and that is the life of the Spirit of God.
• His life is without light. Man without God lives in darkness. His mind is blinded by the god of this world (2Corinthians 4:4In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
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• His life is without foundation. Instead of standing solidly on the foundation of God’s truth, he drowns under the flood of waters above him. He cannot ascend above the deep.

Re-Creation 

Man cannot be restored by a simple reformation. There must be a new creation. At salvation, he is “created in Christ Jesus unto good works” (Ephesians 2:10For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.
See All...). He becomes a new creature (2 Corinthians 5:17Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.
See All...). Old things will pass away and all things will become new. Just as with the original earth, the details of his past life are to be forgotten. He looks at his re-creation as his true beginning. 

What happens to bring man to this new creation? It is brought about by the moving of the Spirit on the face of the deep waters of his heart. As the Spirit moves, he is convicted and brought to a point of decision. To reject means eternal death; to accept the Lord Jesus Christ as Saviour means eternal life. If he accepts, the Spirit regenerates his spirit (Titus 3:5Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;
See All...). The Father declares, “Let there be light” and the light shines forth in his spirit and soul. Further, the Spirit renews the man so that he is “renewed in the spirit” of his mind (Ephesians 4:23And be renewed in the spirit of your mind;
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More important than all doctrinal speculation is whether or not you know Jesus Christ as your personal Saviour. Has there been a time in your life when you recognized your sinful condition and your deserved end in hell, when you realized that Jesus Christ died on the cross for your sins and paid your debt, and when you turned from your sin to believe in Him as your eternal Saviour? If not, why not trust in Him now?