GRANT OPTION

if a user has the GRANT OPTION he can pass this privilege on to other users through a view, without granting the privilege on the original source view:
SQL> grant select on dba_users to dbatest with grant option;
SQL> conn dbatest
SQL> create view da_users as select * from sys.dba_users;
SQL> grant select on da_users to dbatest2;
SQL> conn dbatest2
SQL> select count(*) from dbatest.da_users;

COUNT(*)
----------
40

SQL> select count(*) from sys.dba_users;
select count(*) from sys.dba_users
*
ERROR at line 1:
ORA-00942: table or view does not exist