Because that, when they knew God, they glorified [him] not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
Textus Receptus (TR) - Romans 1:21 >διότι γνόντες τὸν Θεόν, οὐχ ὡς Θεὸν ἐδόξασαν ἢ εὐχαρίστησαν, ἀλλ᾿ ἐματαιώθησαν ἐν τοῖς διαλογισμοῖς αὐτῶν, καὶ ἐσκοτίσθη ἡ ἀσύνετος αὐτῶν καρδία.