Silas spoke to him, saying if Arial dies the next day, with so many hidden dangers in the Empire, the new ruler would be preoccupied with all of the problems that it would not be long before the stability of the Empire would be threatened.
And once the stability is rocked, then the decline of the Empire begins.
Hence, Silas had always advised him to strengthen the foundation of the Empire that even if he were to die, the rock on which the Empire stand would not even shake.
These hidden dangers that Silas referred to is the Old Noble factions, the Conservative faction, the spies from other kingdoms, the disgruntled lords and kings, the opportunist that waited their moment and so on and so forth.
If Arial were to create an eternal empire that would be able to stand through the test of time, he must eliminate these hidden dangers first.
Slowly but surely, then it would be time for the Empire to rise without any interference.