Many questions may here properly arise. How could the material substance of the organic body become no longer material, no longer finite, but Divine substantial or infinite? no longer a vessel of life, but life itself? The truth does not depend on whether we understand such a process or not. We understand so little, even of natural forces like light or electricity, or gravitation, but we accept their effects which we can repeatedly observe and check.It's a simple but good point.
Along these lines you might be interested to read two previous posts, "How Much Do We Need to Understand to Believe?" and "What We Need to Know About the Lord's Coming."