Here is the seventh and final beatitude in Revelation.
Here the word “blessed” is plural, which strongly brings out
the multitude of blessings given to those who wash their
robes. The robe stands for one’s condition of righteousness.
A dirty robe stands for being without righteousness, falling
short of the glory of God. A washed robe is one made white
and clean by faith in the person and work of Jesus Christ.
It means the person stands in the perfect righteousness of
Jesus Christ. It stands for imputed righteousness or
justification by faith in Jesus Christ (2 Corinthians 5:19,
21; Philippians 3 9). Believers, by virtue of the imputed
righteousness of Jesus Christ and their glorified and
sinless bodies, will have both the right and capacity to
dwell in the New Jerusalem in righteousness. By contrast,
unbelievers, who are excluded, are described in verse 15 in
terms which bring out the habitual character that they are
left with because, having failed to believe in the Savior,
they must continue in their sin (John 8:24). The
unregenerate remain in their unregenerate condition and
character throughout eternity. Not only are they excluded
from fellowship with God, but they remain in the misery and
unhappiness of their fallen state, itself, a judgment of the
greatest magnitude. One of the joys the true believer looks
forward to is release from his sinful state, the loss of the
sinful nature.