This is the promise to Israel, what is there to explain--!
We have received such promises even today. Aren’t there similar promises in the gospels?
When we seek the kingdom of God and His righteousness, God will also give us what we need.
As for the things we encounter, sometimes we can also ask God about the future, or we can ask God to ordain His actions.
His works are of righteousness, and he establishes his throne with love and executes righteousness.
Isn’t this the God we believe in!