Augustine of Hippo

But now what? "The earth has flowed down" [Psalm 75:3]. If the earth has flowed down, whence has it flowed down except by sins? Therefore also they are called delinquencies. To delinquish is as it were by a kind of liquidity to slip down from the stability of firmness in virtue and righteousness. For it is through desire of lower things that every man sins: as he is strengthened by the love of higher things, so he falls down and as it were melts away by desire of lower things. …

Exposition on Psalm 75 ↗