Daniel Starch

Advertising as the printed form of selling would seem... ultimately to be justified in so far as it serves as a means of increasing legitimate human wants, as an agency of fair and economic competition in the distribution of goods, and as a stimulant to social progress.

Hammer down product fundamentals first. Make sure you've got something that works before doubling down on promotion and marketing. Create a groundswell of organic support, and only then leverage PR and advertising to spread the word.