Enter A String In Range Object

Sub test()
Dim rng, dest, c As Range
Dim result As String
Worksheets("sheet1").Activate
Set rng = Range([a1], [a1].End(xlDown))
Set dest = Range("d1")
result = ""
For Each c In rng
result = result & " " & c
Next
MsgBox result
dest = result
End Sub

the penultimate code statement "dest=result" does notwork the value of "result" is not entered in "dest" though no error comes up if I use "dest.value=result" it gives error "object required" If I use "range("d1")=result" it works.what is the theoretical mistake.