"“The work that lies before us is one that will put to the stretch every power of the human being. It will call for the exercise of strong faith and constant vigilance. At times the difficulties that we shall meet will be most disheartening. The very greatness of the task will appall us. And yet, with God's help, His servants will finally triumph. ‘Wherefore,’ my brethren, ‘I desire that ye faint not’ because of the trying experiences that are before you. Jesus will be with you; He will go before you by His Holy Spirit, preparing the way; and He will be your helper in every emergency. LS 439.1"
"Be strong and of a good courage, fear not, nor be afraid of them: for the Lord thy God, he it is that doth go with thee; he will not fail thee, nor forsake thee."
Both passages offer encouragement in the face of difficulty, promising God's presence and help. The phrase 'He will go before you' directly echoes the sentiment of Deuteronomy 31:6.
"For God hath not given us the spirit of fear; but of power, and of love, and of a sound mind."
Both passages address the idea of overcoming fear and relying on God's power. While not a direct quote, the underlying theme of not being afraid and relying on God's strength connects the two.
"“‘For this cause I bow my knees unto the Father of our Lord Jesus Christ, of whom the whole family in heaven and earth is named, that He would grant you, according to the riches of His glory, to be strengthened with might by His Spirit in the inner man; that Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love, may be able to comprehend with all saints what is the breadth, and length, and depth, and height; and to know the love of Christ, which passeth knowledge, that ye might be filled with all the fullness of God. LS 439.2"
"For this cause I bow my knees unto the Father of our Lord Jesus Christ, Of whom the whole family in heaven and earth is named, That he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man; That Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love, May be able to comprehend with all saints what is the breadth, and length, and depth, and height; And to know the love of Christ, which passeth knowledge, that ye might be filled with all the fulness of God."
The EGW passage is a direct quote of Ephesians 3:14-19.
"“‘Now unto Him that is able to do exceeding abundantly above all that we ask or think, according to the power that worketh in us, unto Him be glory in the church by Christ Jesus throughout all ages, world without end. Amen.’” The General Conference Bulletin, 1913. LS 439.3"
"Now unto him that is able to do exceeding abundantly above all that we ask or think, according to the power that worketh in us,"
The EGW passage directly quotes Ephesians 3:20, making it an explicit allusion.