These institutions have not, like other institutions of the kind, received endowments or legacies. And yet God has greatly prospered and blessed them, and made them the means of great good. There are aged ones among us who are nearing the close of their probation; but for the want of wide-awake men to secure to the cause of God the means in their possession, it passes into the hands of those who are serving Satan. This means was only lent them of God to be returned to Him; but in nine cases out of ten these brethren, when passing from the stage of action, appropriate God's property in a way that cannot glorify Him, for not one dollar of it will ever flow into the Lord's treasury. In some cases these apparently good brethren have had unconsecrated advisers, who counseled from their own standpoint and not according to the mind of God. Property is often bequeathed to children and grandchildren only to their injury. They have no love for God or for the truth, and therefore this means, all …
"If therefore ye have not been faithful in the unrighteous mammon, who will commit to your trust the true riches?"
The EGW passage directly addresses the principle of faithfulness in handling earthly resources (mammon) and its connection to receiving true riches, mirroring the teaching in Luke 16:11. The idea of not being faithful with what is lent by God is central to both.