Jas 1:21
"Not all Scripture is written to us, but all Scripture is written for us." ~ J. Vernon McGee
"John 8:44
Ye are of your father the devil (ὑμεις ἐκ του πατρος του διαβολου [humeis ek tou patros tou diabolou]). Certainly they can “understand” (γινωσκετε [ginōskete] in 43) this “talk” (λαλιαν [lalian]) though they will be greatly angered. But they had to hear it (ἀκουειν [akouein] in 43). It was like a bombshell in spite of the preliminary preparation. Your will to do (θελετε ποιειν [thelete poiein]). Present active indicative of θελω [thelō] and present active infinitive, “Ye wish to go on doing.” This same idea Jesus presents in Matt. 13:38 (the sons of the evil one, the devil) and 23:15 (twofold more a son of Gehenna than you). See also 1 John 3:8 for “of the devil” (ἐκ του διαβολου [ek tou diabolou]) for the one who persists in sinning. In Rev. 12:9 the devil is one who leads all the world astray. The Gnostic view that Jesus means “the father of the devil” is grotesque. Jesus does not, of course, here deny that the Jews, like all men, are children of God the Creator, like Paul’s offspring of God for all men in Acts 17:28. What he denies to these Pharisees is that they are spiritual children of God who do his will. They do the lusts and will of the devil. The Baptist had denied this same spiritual fatherhood to the merely physical descendants of Abraham (Matt. 3:9). He even called them “broods of vipers” as Jesus did later (Matt. 12:34). A murderer (ἀνθρωποκτονος [anthrōpoktonos]). Old and rare word (Euripides) from ἀνθρωπος [anthrōpos], man, and κτεινω [kteinō], to kill. In N.*T. only here and 1 John 3:15. The Jews were seeking to kill Jesus and so like their father the devil. Stood not in the truth (ἐν τῃ ἀληθειᾳ οὐκ ἐστηκεν [en tēi alētheiāi ouk estēken]). Since οὐκ [ouk], not οὐχ [ouch], is genuine, the form of the verb is ἐστεκεν [esteken] the imperfect of the late present stem στηκω [stēkō] (Mark 11:25) from the perfect active ἑστηκα [hestēka] (intransitive) of ἱστημι [histēmi], to place. No truth in him (οὐκ ἐστιν ἀληθεια ἐν αὐτῳ [ouk estin alētheia en autōi]). Inside him or outside (environment). The devil and truth have no contact. When he speaketh a lie (ὁταν λαλῃ το ψευδος [hotan lalēi to pseudos]). Indefinite temporal clause with ὁταν [hotan] and the present active subjunctive of λαλεω [laleō]. But note the article το [to]: “Whenever he speaks the lie,” as he is sure to do because it is his nature. Hence “he speaks out of his own” (ἐκ των ἰδιων λαλει [ek tōn idiōn lalei]) like a fountain bubbling up (cf. Matt. 12:34). For he is a liar (ὁτι ψευστης ἐστιν [hoti pseustēs estin]). Old word for the agent in a conscious falsehood (ψευδος [pseudos]). See 1 John 1:10; Rom. 3:4. Common word in John because of the emphasis on ἀληθεια [alētheia] (truth). And the father thereof (και ὁ πατηρ αὐτου [kai ho patēr autou]). Either the father of the lie or of the liar, both of which are true as already shown by Jesus. Αὐτου [Autou] in the genitive can be either neuter or masculine. Westcott takes it thus, “because he is a liar and his father (the devil) is a liar,” making “one,” not the devil, the subject of “whenever he speaks,” a very doubtful expression." "Robertson, A. T. (1933). Word Pictures in the New Testament (Jn 8:44). Nashville, TN: Broadman Press.