"Any habit or practice that would lead into sin, and bring dishonor upon Christ, would better be put away, whatever the sacrifice. That which dishonors God cannot benefit the soul. The blessing of heaven cannot attend any man in violating the eternal principles of right. And one sin cherished is sufficient to work the degradation of the character, and to mislead others. If the foot or the hand would be cut off, or even the eye would be plucked out, to save the body from death, how much more earnest should we be to put away sin, that brings death to the soul! DA 439.1"
"And if thy right eye offend thee, pluck it out, and cast it from thee: for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell."
EGW directly alludes to the teaching of Jesus in Matthew 5:29 about plucking out an eye or cutting off a hand to avoid sin, applying it to the need to put away sin to save the soul.
"influence upon the world. Your energy and efficiency in the upbuilding of My kingdom, Jesus says, depend upon your receiving of My Spirit. You must be partakers of My grace, in order to be a savor of life unto life. Then there will be no rivalry, no self-seeking, no desire for the highest place. You will have that love which seeks not her own, but another's wealth. DA 439.2"
"Doth not behave itself unseemly, seeketh not her own, is not easily provoked, thinketh no evil;"
EGW directly quotes the phrase 'seeketh not her own' from 1 Corinthians 13:5, applying it to the context of self-seeking and rivalry among believers.
"Let the repenting sinner fix his eyes upon “the Lamb of God, which taketh away the sin of the world” ( John 1:29 ); and by beholding, he becomes changed. His fear is turned to joy, his doubts to hope. Gratitude springs up. The stony heart is broken. A tide of love sweeps into the soul. Christ is in him a well of water springing up unto everlasting life. When we see Jesus, a Man of Sorrows and acquainted with grief, working to save the lost, slighted, scorned, derided, driven from city to city till His mission was accomplished; when we behold Him in Gethsemane, sweating great drops of blood, and on the cross dying in agony,—when we see this, self will no longer clamor to be recognized. Looking unto Jesus, we shall be ashamed of our coldness, our lethargy, our self-seeking. We shall be willing to be anything or nothing, so that we may do heart service for the Master. We shall rejoice to bear the cross after Jesus, to endure trial, shame, or persecution for His dear sake. DA 439.3"
"The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world."
Ellen White directly references John 1:29 in this passage.