Christ Is All

No matter what you may know, if you do not know that Christ is all, you know nothing at all.
No matter what you may have; if you have all that this world has to offer, if you have not the Son . . . if you have not Christ, you have nothing at all.
No matter what your religion, no matter how zealous you may be, no matter how your profession makes you feel, if Christ is not all, your religion means nothing at all.
What does it mean . . Christ is all?