Sforno on Deuteronomy 32:2/ספורנו על דברים ל״ב:ב׳

1יערוף כמטר לקחי, here my teachings will pour down and flow without interruption like rain for those who understand and are prepared to receive it from the fountain, the source of wisdom.

2תזל כטל אמרתי, and it too will contribute in accordance with the information which has been revealed to ordinary people. Even though these scraps of information are sparse, they are as useful to the recipients as is dew for the grass. The reason is that both in quantity and quality it is כשעירים עלי דשא, intelligent people can discern wonderful insights by listening to these words of mine; [וכרביבים עלי עשב, עשב being coarse, unrefined grass, it is a simile for coarse unrefined people. Ed.] even the most ordinary, uneducated people will acquire some knowledge by listening to what I have to say. It will help them to recognise and appreciate their Maker.