There is a complex and somewhat exhaustive explanation of why oil and water do not mix together. If you were to check in with your local science expert they would use terms like immiscible, density and mass to explain the chemical properties of each liquid. On a very basic level most everyone knows that oil and water do not mix, they both have inherent qualities that make them incompatible.
Paul writes to an audience of believers in Rome that have come to know Christ as their personal Lord and Saviour through the ministry of men like himself and others. Written into Paul’s letter to the Roman believers is a myriad of incredible truths that give instruction and motivation to live vibrant and faithful lives as Christians. Paul’s written message was a reminder to the people about the power of sin and deception that is persistently trying to lead them away from a proper relationship with God. Sin, and our sinful nature have the ability to create conflict between living by the ideals of the world compared to that of God’s call on our lives to live a life holy and pleasing to him. This conflict is much like that between oil and water; Life in Christ (the water), dose not mix with life in the world (the oil). Although the two can coexist together, the both have their inherent qualities that make them incompatible.
The power to overcome sin comes through the life, death and resurrection of Jesus. Through Him we have access to His Father in heaven. Paul writes these words in Romans 15:13, “May the God of hope fill you with all joy and peace as you trust in him, so that you may overflow with hope by the power of the Holy Spirit.” Our hope comes from the Lord through the work of the Holy Spirit when we allow him into our lives. Hope is an anticipation, a confident expectation (faith and trust) in the promise that God will fulfill his promise of eternal life with him. “For in this hope we were saved. But hope that is seen is not hope at all. Who hopes for what they already have? But if we hope for what we do not yet have, we wait for it patiently.” (8:24-25). For all the many earthly things that we have in this world they cannot and will not fulfill the promise of something better, they are only temporary. A question I often ask of myself is this, is my hope overflowing in a way that it spills out so others can see? God provided a way for joy and peace in life and that comes through his Son, a joy and peace that fuels our hope. The power of hope in Christ over shadows the power of sin, it separates us from the world.