“But if one loves God,
One is known by him.”
εἰ δέ τις ἀγαπᾷ τὸν Θεόν, οὗτος ἔγνωσται ὑπ’ αὐτοῦ.
Paul said that if anyone loves God (εἰ δέ τις ἀγαπᾷ τὸν Θεόν), that one is known by him (οὗτος ἔγνωσται ὑπ’ αὐτοῦ). Paul simply said that if you loved God, then God would know you. If you loved God, you were his beloved, so that obviously God knew who you were. Does God know you?