Analysis of A Good Night

Close now thine eyes and rest secure;
Thy soul is safe enough, thy body sure;
    He that loves thee, He that keeps
And guards thee, never slumbers, never sleeps.
The smiling conscience in a sleeping breast
     Has only peace, has only rest;
     The music and the mirth of kings
  Are all but very discords, when she sings;
     Then close thine eyes and rest secure;
No sleep so sweet as thine, no rest so sure.