"You are in terrible darkness, and unless you arise in the name of God, and break asunder the fetters of Satan, and assert your freedom, you will make shipwreck of the faith. So great is the unwillingness of the Lord to leave you, and such is His love toward you, that notwithstanding your life has not been in accordance with His will, and your works and ways have been offensive to Him, the Majesty of heaven condescends to beg the privilege of making you a visit and leaving you His blessing: “Behold, I stand at the door, and knock.” The mansions in glory are His, and the joy of that heavenly abode; yet He humbles Himself to seek an entrance at the door of your heart, that He may bless you with His light and make you to rejoice in His glory. His work is to seek and to save that which is lost and ready to perish. He wishes to redeem as many as He can from sin and death, that He may elevate them to His throne and give them everlasting life. 2T 224.1"
"Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me."
EGW directly quotes Revelation 3:20 and expands on its meaning in the context of personal salvation.
Brother B, be entreated to arise and cast aside your doubts. What makes you inclined to doubt? It is your life of departure from God, your life of unconsecration, your jesting and joking. Your lack of sobriety is endangering your eternal interests. Christ is inviting you to turn from these follies to Him. You are not growing in grace and in the knowledge of the truth. You are not an honor to the cause. You are not becoming elevated, but are sinking lower and lower in the scale. You are not forming a character for heaven and everlasting life. 2T 224.2 You are pleasing yourself, passing away time in frivolity which should be spent with your family, teaching your children the ways and works of God. The hours that you spend in company that does you only harm should be devoted to prayer and the study of God's word. You should feel that a responsibility rests upon you, as head of your family, to bring up your children in the nurture and admonition of the Lord. What account will you render to…
"Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap."
The EGW passage discusses the consequences of a life of sin and departure from God, which aligns with the principle of reaping what you sow in Galatians 6:7.