"Earnest, self-sacrificing men and women are needed, who will go to God and with strong crying and tears plead for the souls that are on the brink of ruin. There can be no harvest without seed-sowing, no result without effort. Abraham was called to go forth from his home, a light-bearer to the heathen. And without questioning, he obeyed. “He went out, not knowing whither he went.” [ Hebrews 11:8 .] So today God's servants are to go where He calls, trusting Him to guide them and to give them success in their work. GW 26.1"
"By faith Abraham, when he was called to go out into a place which he should after receive for an inheritance, obeyed; and he went out, not knowing whither he went."
Ellen White directly references Hebrews 11:8 in this passage.
"The terrible condition of the world would seem to indicate that the death of Christ has been almost in vain, and that Satan has triumphed. The great majority of this earth's inhabitants have given their allegiance to the enemy. But we have not been deceived. Notwithstanding the apparent triumph of Satan, Christ is carrying forward His work in the heavenly sanctuary and on the earth. The word of God portrays the wickedness and corruption that would exist in the last days. As we see the fulfilment of prophecy, our faith in the final triumph of Christ's kingdom should strengthen; and we should go forth with renewed courage to do our appointed work. GW 26.2"
"And we know that we are of God, and the whole world lieth in wickedness."
Both passages address the pervasive wickedness in the world. EGW expands on this by connecting it to the apparent triumph of Satan, while 1 John 5:19 simply states the world's condition.