Commentaries:
Robertson's Word Pictures (NT)
If we confess (ean omologwmen). Third-class condition again with ean and present active subjunctive of omologew, "if we keep on confessing." Confession of sin to God and to one another (James 5:16) is urged throughout the N.T. from John the Baptist (Mark 1:5) on.
Faithful (pistov). Jesus made confession of sin necessary to forgiveness. It is God's promise and he is "righteous" (dikaiov).
To forgive (ina afh). Sub-final clause with ina and second aorist active subjunctive of afihmi.
And to cleanse (kai agiash). So again with ina and the first aorist active subjunctive of kaqarizw (verse I John 1:7).
Other Robertson's Word Pictures (NT) entries containing 1 John 1:9:
Matthew 1:22
1 John 1:7
1 John 2:1
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