It is simply expression, as Harry says, that gives reality to things.

Whoever gives reality to his dreams must give them the equilibrium of reality.

That, he always says, gives reality a bit of a chance.

The dash of human infirmity and fatherly blindness gives reality to the picture.

And I thought of Him who alone gives reality to even such joys as these.

Some further memoranda made at this time have that intimate interest which gives reality and charm.

Without sentimentality she gives reality to her characters, and also to the tormented country in which they live.