Double-check this Breton quotation for me?

I was poking around the internet and came across an English translation of a quotation from Breton:

Imagination is not a gift but an object of conquest par excellence

The original quotation proved obscure, but I did, in the end, manage to find this:

L'imagination n'est pas don mais par excellence objet de conquête

which has been quoted in several (3-4 places on the internet). However, it seems a bit strange to me, especially the placement of "par excellence" and that there is no "un" before the "don". I presume this is because of my less-than-perfect French, but I would be very appreciative if someone with a firmer grasp of French could confirm that the quotation is indeed accurate and put my mind at ease.

Thanks in advance!