"The spirit of hatred and revenge originated with Satan, and it led him to put to death the Son of God. Whoever cherishes malice or unkindness is cherishing the same spirit, and its fruit will be unto death. In the revengeful thought the evil deed lies enfolded, as the plant in the seed. “Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.” 1 John 3:15 . MB 56.2"
"Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him."
Ellen White directly references 1 John 3:15 in this passage.
"“Whosoever shall say to his brother, Raca [vain fellow], shall be in danger of the council.” In the gift of His Son for our redemption, God has shown how high a value He places upon every human soul, and He gives to no man liberty to speak contemptuously of another. We shall see faults and weaknesses in those about us, but God claims every soul as His property—His by creation, and doubly His as purchased by the precious blood of Christ. All were created in His image, and even the most degraded are to be treated with respect and tenderness. God will hold us accountable for even a word spoken in contempt of one soul for whom Christ laid down His life. MB 56.3"
"But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire."
EGW quotes Matthew 5:22 and expands on its meaning, connecting it to the value God places on each soul.
"So God created man in his own image, in the image of God created he him; male and female created he them."
EGW's statement that all were created in God's image directly reflects the principle established in Genesis 1:27.