John 5:42

But I know you (alla egnwka uma). Perfect active indicative of ginwskw, "I have come to know and still know," the knowledge of personal experience ( 1 Thessalonians 2:24 ). The love o' God (thn agaphn tou qeou). Objective genitive, "the love toward God." See Luke 11:42 for this phrase in the same sense (only other instance in the Gospels, but common in 1John ( 1 John 2:5 ; 1 John 3:17 ; 1 John 4:7 1 John 4:9 ; 1 John 5:3 ) and in 2 Thessalonians 3:5 ; 2 Corinthians 13:14 ; Romans 5:5 . The sense of God's love for man occurs in 1 John 3:1 ; 1 John 4:9 1 John 4:10 1 John 4:16 ; John 15:9 of Christ's love for man. These rabbis did not love God and hence did not love Christ.