The Earth Will Never Be Devoid of The Divine Proof 

Amirul Momineen Ali (A.S.) said,
"The earth shall never be devoid of the Divine Proof, He may be apparent and prominent or he may be concealed and hidden. And it is because of him that the proofs and signs of Allah are not wasted."
(Kamaaluddm Vol.1 Pg. 291)
Imam Jafar as Sadiq (A.S.) said
"The (Divine) Proof was existing before creation (of other things), during creation and after creation".
(Kamaaluddm VoL I, Pg.23J.232)
Imam Jafar as Sadiq (A.S.) said.
"Because Allah is great and mighty, He has never made the earth devoid of a just Imam".
(Kamaaluddin Vol. 1 Pg.229 and 234)
Imam Jafar as Sadiq (A.S.) said,
"Even if two people remain on the earth. One of them shall be a Hujjat upon the other. And if one of them dies, it will be the Hujjat that remains".
(Kamaaluddin Vol.1 Pg.233)
Imam Raza (A.S.) said,
"Certainly, the earth shall never be devoid of one of us. Imams".
(Kamaaluddin VoU Pg.229)