21 I do not write to you because you do not know the Truth (or: [new] Reality), but rather because you do know it, and because every lie is not forth from the Truth (or: even that all falsehood is not [coming] from Reality).
1 John 2:21 Cross References - JMNT
Romans 15:14-15
14 Now, my brothers (Family members; fellow believers), I myself also have been persuaded and remain convinced about you that you yourselves are (or: exist being) folks stuffed full of goodness (bulging with excellence and quality), being those having been filled and remaining full of all The Knowledge (intimate, experiential knowledge and insight; [with other MSS: all gnosis]), being folks continuously able and empowered, also, to habitually put one another in mind (or: to place [thoughts] in each other's mind; to advise or admonish).
15 Yet I more daringly write to you (or: Yet with assumed resolution I outspokenly write to you; [other MSS add: brothers; = fellow believers]) partly as habitually calling you back to full recollection (causing you to be completely remembering) because of the grace and favor being given to me from [other MSS: by; under] God,
2 Peter 1:12
12 Wherefore (or: For this cause) it will always continue being my intent to be constantly reminding you concerning these things – even though [you are] being folks having seen and thus knowing, and ones being set and firmly established within the truth and reality [that is] being continuously present (existing alongside) [with and in you].
Jude 1:5
5 But I am purposing and intending to remind you [p78 adds: brothers] – you folks having once seen and thus being aware of all this – that the Lord [= Yahweh; other MSS: Jesus (= Joshua); some read: God] after delivering (rescuing; saving) a people out of Egypt's land, [in] the second [phase] brought to ruin and loss the folks not trusting, believing or being loyal.