"The word “therefore” implies a conclusion, an inference from what has gone before. Jesus has been describing to His hearers the unfailing mercy and love of God, and He bids them therefore to be perfect. Because your heavenly Father “is kind unto the unthankful and to the evil” ( Luke 6:35 ), because He has stooped to lift you up, therefore, said Jesus, you may become like Him in character, and stand without fault in the presence of men and angels. MB 76.1"
"But love ye your enemies, and do good, and lend, hoping for nothing again; and your reward shall be great, and ye shall be the children of the Highest: for he is kind unto the unthankful and to the evil."
Ellen White directly references Luke 6:35 in this passage.