By this we know that we are in Him
1 John 2:5-6. New American Standard Bible
5 but whoever follows His word, in him the love of God has truly been perfected. By this we know that we are in Him: 6 the one who says that he remains in Him ought, himself also, walk just as He walked. Is John claiming that we can be perfect? The answer is no. When John speaks of the love of God being perfected it is speaking of being matured in Christ. John has connected keeping the word of God with maturing and growing in Christ.