SQL & PL/SQL :: Creating A View From Procedure

I have create a procedure as

create or replace procedure aa is
abc varchar2(1000);
begin
abc:='create or replace view abc_view as select * from abc';
execute immediate abc;
end;

When i try to execute the same as

BEGIN
aa;
END;

i got error as

ORA-01031: insufficient privileges
ORA-06512: at "EARS.AA", line 5
ORA-06512: at line 3

why i get this error. there is no problem in grants. the same create or replace view query works if i directly executes in sql.