What does "growing from strength to strength" mean?

as the title asks What does growing from strength to strength mean ?
A Google search yields meaning for the word strength and not the phrase. [It would be great if somebody can provide URL/search engine for looking for the meaning of such phrases]

Context

During my own lifetime our popular cinema has auspiciously grown from strength to strength

Source : Acceptance speech at the Brisbane Doctorate ceremony

Solution 1:

http://www.google.com/search?q=define+from+strength+to+strength

yields

http://www.phrases.org.uk/meanings/144200.html

Meaning

Progress from one success to another higher level of success. Origin

From the Miles Coverdale's Version of the Bible, Psalms 84:7:

They go from strength to strength and so the God of Gods apeareth vnto the in Sion.

Solution 2:

I think the customary phrase is going from strength to strength, rather that growing... (the former phrase is the one I hear more often and has four times as many Google results, for what that's worth).

Other than that I can't add anything to mplungjan's answer.