Adding 'self'

[Hanifasmm]

Hi everybody,
1.David hid behind the wall.
1a.David hid himself behind the wall.
2.They resigned to the will of God.
2a.They resigned themselves to the will of God.
Are all above sentences O.K?
If you find mistakes in them please explain me
with grammatical details.
Thanks,
Yours truly,
Er.S.M.M.Hanifa

[Mister Micawber]

This one is not:

2. (X) They resigned to the will of God.

'Resigned' needs an object, which the reflexive serves as in #2a.
_________________
Native English teacher at Mister Micawber's