Philippians 3:9 And be found in him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith
‘In him’ The so-called doctrine of interpenetration, that is, persons entering physical into each other, is false. The Bible does speak of the Corinthians and Philippians being in Paul’s heart (1:7; 2Cor. 7:3;); God being in Christ (2Cor. 5:19); Christ being in God (John 14:20); God and Christ being in each other (John 14:10-11); men being in both the Father and the Son (1Jn_2:24); men being in Christ (2Co_5:17); men and the Spirit being in each other (Rom. 8:9); Christ being in men (Col. 1:27; Rom. 8:10); man and Christ being in each other (John 14:20); all creation being in God (Acts17:28) and satan entering into men (Luke 22:3; John 13:27). However, these passages refer to being in union with, being consecrated to the same end – one in mind, purpose, and life. They do not teach the physical entrance of one being into another. It may be best understood by a man and woman becoming one in life together, being in each other’s plans, life, etc. Therefore, because we do not know any man after the flesh, not even Christ, it is vain for any man to profess a relationship with Christ according to the flesh, while he is unchanged in heart and life and dead in trespasses and sins.
‘Not having mine own righteousness, which is of the law.’ Man’s righteousness is not enough (Isa. 64:6; Luke 18:9-14; Rom. 10:1-13).
‘That which is through the faith of Christ, the righteousness which is of God by faith.’ God’s righteousness comes through Christ (1Cor. 1:30) and by faith (Gen. 15:6; Rom. 3:22-26; 4:1-25; 9:30-31; 10:1-13).