(Great song, written by Bob Dylan, performed by John for the soundtrack of "I'm Not There". 
Pretty easy to play, but it sounds great with an organ and a choir.)

Tuning: Standard
Chords:
E - 022100
Abm - 466444
A - x02220
B - x24442

    E
I'm pressing on.
    Abm
I'm pressing on;
    A        E
I'm pressing on
       A       B            E
To the higher calling of my love.


E           Abm
Many try to stop me,
         A        E
Shake me up in my mind
                    Abm
Saying, "prove that he's the Lord,
A         E
Show me a sign!"
                  Abm
What kind of sign may it be,
         A             E
When it comes from within?
                     Abm
When what's lost has been found,
        A                E
What's come has already been.


(And repeat. The chord progression is the same for each verse and chorus.)