"***** The Christian pilgrim does not yield to his desire to rest. He moves steadily forward, saying: “The night is far spent, the day is at hand.” This is his motto: “Not as though I had already attained, either were already perfect: but I follow after.... I count not myself to have apprehended: but this one thing I do, forgetting those things which are behind, and reaching forth unto those things which are before, I press toward the mark for the prize of the high calling of God in Christ Jesus.” Philippians 3:12-14 . 8T 18.3"
"Not as though I had already attained, either were already perfect: but I follow after, if that I may apprehend that for which also I am apprehended of Christ Jesus. Brethren, I count not myself to have apprehended: but this one thing I do, forgetting those things which are behind, and reaching forth unto those things which are before, I press toward the mark for the prize of the high calling of God in Christ Jesus."
Ellen White directly references Philippians 3:12-14 in this passage.