Assign worksheet to Global variable. Possible? or Worth it?

[POE333]

Hello all,
I'm tying to figure out how to declare a variable of a worksheet as global so that it can be used from any module.
My best try (failing) looks like this...

Option Explicit
 
 Public wsI2 As String
 wsI2 = "Input"
 wsI2 = Worksheets(wsI2)

 Public wsI As Worksheet
    wsI = Sheets("Input")

 Public wsO As Worksheet
    wsO = Sheets("Output")

 Public wsR As Worksheet
    wsR = Sheets("Results")

 Public HDT As Worksheet
    wsH = Sheets("HDT")

 Public HDT As Worksheet
    HDT = Sheets("HDT")

 Public GLL As Worksheet
    GLL = Sheets("GLL")

 Public GGA As Worksheet
    GGA = Sheets("GGA")

 Public HDT As Worksheet
    wsH = Sheets("HDT")

Sub NavPage1()
    wsI2.Select
End Sub

I have no idea how to make this work. I've looked everywhere I can think of.