How could God's form be seen prior to His incarnation? In a seeker's Bible discussion last week, I had explained that God created the physical world and, therefore, existed outside the physical world.  I stated that He entered into the physical world in His incarnation.  It seemed that God would not have a physical form until then.

However, Adam and Eve are said to have walked with God in the garden.  Furthermore, it would seem that God spoke to Abraham regarding the destruction of Sodom.  It is also believed by many that the fourth person in the fiery furnace was the pre-incarnate Christ.  Moses also saw the glory of God.  Jacob wrestled with God.  Isaiah saw the throne of God.

However, this brings up the question of how God could have a physical appearance prior to His incarnation.  Were the instances where people were enabled to see spiritual things with physical eyes?
Methinks that the problem lies with this statement:


  I stated that He entered into the physical world in His incarnation.


Your multiple examples demonstrate that God did manifest a physical form before He was incarnated in Jesus. However, this physical form wasn't necessarily human flesh and blood. Quite possibly a human appearance, like the angels (Mark 16:5-6 as an example), but not necessarily human "material", so to speak.

So, in essence, God may have had a flesh-and-blood body only after the incarnation, but there's no reason He couldn't have had a physical form (that looked like a human) before the incarnation.