Today's Chinese proverb is actually more of an idiom. However seen as I seem to be spending increasing amounts of my time marketing on projects recently this one seems very appropriate for me at the moment. As most of the time I spend trying to make other people becoming advocates, this is a phrase I would be using quite often.

When you break these characters down its meaning is very clear. To devolop and to promote (making something bigger).

发扬光大
fā yáng guāng dà
Advocate

Incidently I have learnt the last two of these characters with Heisig, which means 光 ray (of light) and 大 big.