{The same is known of him} (houtos egn(9373)tai hup' autou).
Loving God (condition of first class again) is the way to come to
know God. It is not certain whether houtos refers to the man
who loves God or to God who is loved. Both are true. God knows
those that are his ( 2Ti 2:19  Ex 33:12 ). Those who know God are
known of God ( Ga 4:9 ). We love God because he first loved us
( 1Jo 4:19 ). But here Paul uses both ideas and both verbs.
Egn(9373)tai is perfect passive indicative of gin(9373)k(935c), an abiding
state of recognition by (hup') God. No one is acquainted with
God who does not love him ( 1Jo 4:8 ). God sets the seal of his
favour on the one who loves him. So much for the principle.