"The Saviour does not point forward to a time when all the tares become wheat. The wheat and tares grow together until the harvest, the end of the world. Then the tares are bound in bundles to be burned, and the wheat is gathered into the garner of God. “Then shall the righteous shine forth as the sun in the kingdom of their Father.” Then “the Son of man shall send forth His angels, and they shall gather out of His kingdom all things that offend, and them which do iniquity; and shall cast them into a furnace of fire; there shall be wailing and gnashing of teeth.” COL 75.1"
"Let both grow together until the harvest: and in the time of harvest I will say to the reapers, Gather ye together first the tares, and bind them in bundles to burn them: but gather the wheat into my barn."
EGW directly quotes and interprets Matthew 13:30 regarding the separation of wheat and tares at the harvest.
"Then shall the righteous shine forth as the sun in the kingdom of their Father. Who hath ears to hear, let him hear."
EGW directly quotes Matthew 13:43 regarding the righteous shining forth.
"The Son of man shall send forth his angels, and they shall gather out of his kingdom all things that offend, and them which do iniquity; And shall cast them into a furnace of fire: there shall be wailing and gnashing of teeth."
EGW directly quotes Matthew 13:41-42 regarding the gathering of offenders and their punishment.