Thirsting Souls Bible Teaching

(Heb 2:2) “For if the word spoken by angels was stedfast, and every transgression and disobedience received a just recompence of reward;”  What made the word of angels “stedfast” (unchangeble)?” Answer: the Words were not their own, but exactly what God wanted said: (Isa_55:11) “So shall my word be that goeth forth out of my mouth: it shall not return unto me void, but it shall accomplish that which I please, and it shall prosper in the thing whereto I sent it.”