Vba Executing Text Strings As Code

if I can send text to a macro and have VBA treat the text as a line of code?

Suppose in a worksheet in cell A1 there is the following "text"
msgbox "hi there"

can you get vba to do the following:

Sub runtext()
Mytext = sheets(1).range("a1").text
XXXXXX Mytext
End Sub

where "XXXXXX" is a method or command that will cuase vba to evaluate the text string and run it as a line of code (returning a message box saying "hi there")

I don't want to send variables/objects to an existing method in VBA - I want to send the method to VBA....