But it is more a matter of substance.

ECONOMIST: Where do America��s interests lie?

And even then, the real significance is more a matter of style than substance.

CNN: A Message To Investors

It could also cast light on the mystery of dark matter, a substance that pervades the universe in vastly larger quantities than familiar, visible matter, but whose existence can be inferred only by watching its gravitational effect on visible matter.

ECONOMIST: Particle accelerators

The symbolism will matter as much as the substance of the budget proposed this week.

FORBES: GOP Budget: The Mother of All Cuts?

How does this go to the substance of the matter, which is the recess appointment itself?

WHITEHOUSE: Press Briefing

There, finding just the right substance is a matter of painstaking trial and error, which has continued over decades.

ECONOMIST: Combinatorial chemistry

Cosmologists reckon that at least a quarter of the universe is composed of dark matter, a mysterious substance that neither emits nor absorbs light.

WSJ: New Data Boosts Case for Higgs Boson Find

Even less than diplomats do they know languages, or the substance of any subject matter that would lead to natural contact with sources.

CENTERFORSECURITYPOLICY: Freedom Flame 2013

Anyone who wishes to discuss anything of substance concerning the subject matter of any post on this site without ad hominem attacks, hateful stereotyping and the like is welcome here.

FORBES: This Space Is For Adults Only

This invisible substance apparently makes up five-sixths of the universe's matter, and its gravitational attraction is what's thought to hold galaxies together.

MSN: We could soon detect the first stars in our universe

This could give substance to the alliance's repeated declaration that the independence and security of these countries is a matter of direct and material concern to us.

ECONOMIST: No to NATO expansion