from - KtuluKid@aol.com and Michael James 
After Forever - Bass
black Sabbath - Master Of Reality (1971)

Just hold the G     Main Riff
     ||----------------||------------------------------------------12-14--
     ||----------------||------------------------------------12-14--------
     ||----------------||--------------5h7/12--12-12--12--12--------------
     ||-5--5---5---5---||-5--5-5--5--5------------------------------------
                                                           Have you ever
     -12h14-12h14-12h14--------12-14---------------------||---------------
     --------------------12-14---------------------------||---------------
     -------------------------------12--12-12--12--12---||-5-5h7-7-7-7--7
     --------------------------------------------------5-||---------------
     thought about your soul, can it be...   Could you be afraid of what.. 
     ---------------------------------------||----------------|-----------
     ---------------------------5-5-5-5-5-4-||-----5-3--------|-----8-----
     -7h10101010-5-5h7-7-7-7--7-------------||---------5-3----|-8-8---10-10
     ---------------------------------------||-3-3----------5-|-----------
          Is your mind so small that you...                This riff here
     ----||------------------------------||                is actually
     ----||-----7-5----------------------||                played an oct- 
     -8-||---------7-5---------3--------||                ave lower than 
     ----||-5-5----------7--3-3---5-5--3-||                tabbed but that
       I think it is true, it was people like you that...  means you have
     ||----------------------------------------------------tune down to Eb
     ||----------------------------------------5-5-5-5--5-5-6-||------7--7
     ||-5-5h7-7-7-7--7-7h10101010-5h7-7-7-7--7----------------||----------
     ||-------------------------------------------------------||-5--5-----
                    Solo, groove of off A


     -------------||-----------------------------||This is not the||------
     -------------||-------------------5---7-5---||actual bassline||------
     -5h6----5----||---------5----5--7---7-----7-||just kinda an  ||------
     -----8-----8-||-7-7-5-7----7----------------||example.       ||------
     Outro, do main riff acuople of times followed by this
     ------------------------------------------12h14--12h14-12h14--12h14--
     ------------------------------------12h14----------------------------
     --------------5h7/12--12-12--12--12----------------------------------
     -5--5-5--5--5--------------------------------------------------------

     -12h14-14-14-14-14-12h14-14-14-14-14-12h14-14-14-14-14-12h14-14-14-14
     ---------------------------------------------------------------------
     ---------------------------------------------------------------------
     ---------------------------------------------------------------------
                    fade out...
     -14-12h14-14-14-14-14-----||This songs a little tricky, after doing 
     --------------------------||the middle section("can you be afraid of 
     --------------------------||what your friends might say...")you play
     ----------------------5---||the vocal riff and the last time before
     /=slide up  =slide down  the funky pre-solo you do what's tabbed out
     h=hammer-on               where it say's "I think it is true, it was
                               people like you that..."then you play the
                               funky pre-solo, then to the solo and go 
                               from there.