"The Lord God of heaven will not send upon the world His judgments for disobedience and transgression until He has sent His watchmen to give the warning. He will not close up the period of probation until the message shall be more distinctly proclaimed. The law of God is to be magnified; its claims must be presented in their true, sacred character, that the people may be brought to decide for or against the truth. Yet the work will be cut short in righteousness. The message of Christ's righteousness is to sound from one end of the earth to the other to prepare the way of the Lord. This is the glory of God, which closes the work of the third angel. 6T 19.1"
"Surely the Lord God will do nothing, but he revealeth his secret unto his servants the prophets."
Both passages emphasize that God reveals His plans through prophets or watchmen before enacting judgment. Amos 3:7 explicitly states this principle, and EGW applies it to the end-time warning.
"For he will finish the work, and cut it short in righteousness: because a short work will the Lord make upon the earth."
EGW directly alludes to the concept of the work being 'cut short in righteousness,' which is a key phrase from Romans 9:28. She connects this to the message of Christ's righteousness preparing the way for the Lord.