ἴσθι δὲ πραΰς, ἐπεὶ οἱ πραεῖς κληρονομήσουσιν τὴν γῆν.

1. ἴσθι
   know
   be
2. δὲ
   but
   and
3. πραΰς
   gentle
   meek, humble
4.  
   ,
    
5. ἐπεὶ
   since
6. οἱ
   the
7. πραεῖς
   meek
8. κληρονομήσουσιν
   will inherit
   they will inherit
9. τὴν
   the
10. γῆν
    land
    earth
11.  
    .
     

be gentle, for the meek will inherit the earth.