"Sanctify them through thy truth: thy word is truth."
EGW directly quotes John 17:17.
"Men and women who profess to be disciples of Christ and to keep all the commandments of God will have to feel in their daily lives the true spirit of agonizing to enter in at the strait gate. The agonizing ones are the only ones who will urge their passage through the strait gate and narrow way that lead to life eternal, to fullness of joy and pleasures forevermore. Those who merely seek to enter in will never be able. The entire Christian life of many will be spent in no greater effort than that of seeking, and their only reward will be to find it an utter impossibility for them to enter in at that strait gate. 2T 479.2"
"Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat: Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it."
EGW elaborates on the concept of the 'strait gate' and 'narrow way' mentioned in Matthew 7:13-14, emphasizing the effort required to enter.