Abraham wasn't thinking about where he was coming from.
Why? God had promised something better:
"1Now the LORD had said unto Abram, Get thee out of thy country, and from thy kindred, and from thy father's house, unto a land that I will shew thee:
2And I will make of thee a great nation, and I will bless thee, and make thy name great; and thou shalt be a blessing:
3And I will bless them that bless thee, and curse him that curseth thee: and in thee shall all families of the earth be blessed." (Genesis 12: 1-3)
God offered to him a better land, with a better legacy than what awaited him in his home country.
This blessings, this Promised Land, speaks of the Promised Person: Jesus:
"That the blessing of Abraham might come on the Gentiles through Jesus Christ; that we might receive the promise of the Spirit through faith." (Galatians 3: 14)
Through the Spirit of God, we receive life and sonship in Christ:
"And if Christ be in you, the body is dead because of sin; but the Spirit is life because of righteousness." (Romans 8: 10)
"For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father." (Romans 8: 15)
We are no longer dead in our trespasses, but we are alive and seated in heavenly places with Christ Jesus:
"But God, who is rich in mercy, for his great love wherewith he loved us, 5Even when we were dead in sins, hath quickened us together with Christ, (by grace ye are saved;) 6And hath raised us up together, and made us sit together in heavenly places in Christ Jesus: " (Ephesians 2: 4-6)
We were dead, and now we are live. There is no going back to where we were, because we have
"And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand." (John 10: 28)
You cannot be removed from this hand, not even yourself. That is what eternal life is all about!
The Old Testament saints never worried about where they had been. They trusted where God was taking them, and believed that He would keep them. Today, those promises have been fulfilled for us.
Let no one deceive you into thinking that you can backslide, or be lost again. We were dead, and now we are live in Christ. We were alienated, and now we are accepted (Ephesians 1: 3). We have no reason to be mindful of where we were, because we are in Christ today, and He will never leave us nor forsake us (Hebrews 13: 5)