The redeemed are described in revelation in a two-fold way. They did not defile themselves with sin and kept themselves pure. But these are the ones who enjoy the company and the activities of the Lamb in the New Jerusalem and on the new earth and in the new heavens. Sin is not only deceitful, it is variable and subtle in its forms. Always present to some degree is pride.
Sin is pervasive.
Cleanse thou me from secret faults. Keep back thy servant from presumptuous sins. As we have seen sin is deceitful. Its trend always is to make excuses. Cleanse thou me from secret sins.