As is the earthy, such are they also that are earthy: and as is the heavenly, such are they also that are heavenly.
As is the earthy - namely, Adam.
They also that are earthy - all Adam's posterity in their natural state (John 3:6-7).
The heavenly - Christ.
They also that are heavenly - His people in their regenerate state (Philippians 3:20-21). As the former precedes the latter state, so the natural bodies, precede the spiritual.