“And you were dead in the trespasses and sins in which you once walked, following the course of this world, following the prince of the power of the air, the spirit that is now at work in the sons of disobedience— among whom we all once lived in the passions of our flesh, carrying out the desires of the body and the mind, and were by nature children of wrath, like the rest of mankind.” – Ephesians 2:1-3
And you were dead in the trespasses and sins in which you once walked, – Here Paul says that the Ephesian believers (and, by implication, you and I) were once dead in our sins.
Following the course of this world, – Being dead to God we were following the “course of this world.”
Following the prince of the power of the air, – Being dead to God we were gladly following Satan.
The spirit that is now at work in the sons of disobedience – This provides a further description of Satan and his work.
Among whom we all once lived in the passions of our flesh, – We lived among and were at one point “sons of disobedience.” Being sons of disobedience we made our choices based on “the passions of our flesh.”
Carrying out the desires of the body and the mind – Again, as sons of disobedience we lived in the sinful desires of our body and our mind (for more on the state of our sinful mind see Romans 8:7-8).
And were by nature children of wrath, – We are born enemies of God (Romans 5:10, 8:7-8). We naturally abide under God’s wrath, making us “children of wrath.” In our natural state we joyfully disobey God (Genesis 6:4) and are subject to the whole of His just and loving wrath.
Like the rest of mankind. – This is the state everyone on the planet is born into – enemies of God, hating God (Romans 3:9-20, 23). Everyone, by nature, makes their choice based on their sinful desires.
My new favorite song, from my new favorite group:

[T]here is no such thing as preaching Christ and Him crucified, unless we preach what nowadays is called Calvinism. It is a nickname to call it Calvinism; Calvinism is the gospel, and nothing else. I do not believe we can preach the gospel, if we do not preach justification by faith, without works; nor unless we preach the sovereignty of God in His dispensation of grace; nor unless we exalt the electing, unchangeable, eternal, immutable, conquering love of Jehovah; nor do I think we can preach the gospel, unless we base it upon the special and particular redemption of His elect and chosen people which Christ wrought out upon the cross; nor can I comprehend a gospel which lets saints fall away after they are called, and suffers the children of God to be burned in the fires of damnation after having once believed in Jesus.
“Thou shalt love thy neighbor as thyself.” Now you love yourself suitably when you love God better than yourself. What, then, you aim at in yourself you must aim at in your neighbor, namely, that he may love God with a perfect affection. For you do not love him as yourself, unless you try to draw him to that good which you are yourself pursuing. For this is the one good which has room for all to pursue it along with thee. From this precept proceed the duties of human society.