παθὼν ἀντιδρᾶν

From LSJ

ἀκμὴ οὐδὲ ἔχει γενέσεως ὑπόστασιν καθ' ἑαυτήν → the culmination has no power of originating by itself

Source

English > Greek (Woodhouse Quotes Reversed)

repay measure for measure, repay tit for tat