Reconciliation means, “having made peace between two conflicting parties; ending an estrangement”. Reconciliation requires two or more parties at which enmity or conflict exists between them. In 1978, in what is known as the Camp David Accords, then President Jimmy Carter was instrumental in negotiating a peace agreement between the countries of Israel and Egypt. And, in 1979 leaders from these two countries signed the peace treaty known as The Egypt-Israel Peace Treaty, effectually ending years of conflict between these two countries. The two countries were thus reconciled.
There is another conflict between two parties far greater than what Israel and Egypt once encountered. This conflict, or separation, occurred between man and God. It first started thousands of years ago in the Garden of Eden in which sin first entered into the world as a result of man’s disobedience towards God. In other words, man was the offending party and therefore death began its reign. This separation and estrangement continued on for thousands of years. To be clear God never separated himself from man. Instead, man separated himself from God. But, God took the initiative towards reconciliation.
Beginning with Abraham, God set out on a plan towards reconciliation which culminated in one single and momentous day on some obscure hill in Jerusalem. Upon this hill known as Golgotha is where God’s one and only Son was crucified and died on a cross, becoming the sacrificial offering for all of man’s sins. Essentially erasing all of man's sins and making a clean slate. This satisfied what was needed to not only atone for all of man’s sins, but reconciled all men to God. In other words, God did His part in taking the necessary step involved in bringing back together what was a broken relationship.
However, there are two parties involved, and since God has already done His part in reconciling man to Himself, now man must respond in kind by reconciling himself to God. This can only be accomplished by accepting God’s free gift of salvation, God’s grace through faith in Jesus Christ. Any man who accepts this gift becomes fully reconciled to God resulting in a redeemed and eternal life as originally intended when God created Adam in the Garden of Eden. However, if a person chooses to reject Christ, he is not fully reconciled to God and will continue to spend all of eternity separated from God, both here on earth now and life thereafter.
"If reconciliation is God’s chief business, it is ours—between man and God, between man and himself, and between man and man." (E. Stanley Jones)