How to use "maintain" in a sentence

I trust this will not be regarded as a menace, but only as the declared purpose of the Union that it WILL Constitutionally defend and maintain itself.

Gazing at the dead boy's toys and pathetic treasures, Tina realized, not for the first time, that it wasn't healthy for her to maintain this place as if it were a museum

Chilled, Tina said, "But how much could the kids have seen? You're the one who said security was easy to maintain when one of these installations is located in the wilderness

We don't have any choice but to maintain a strong defense

The heating coils would probably have to maintain the road at about 38 to 40 degrees Fahrenheit to be sure that it remained free of snow and ice

The aim of the Brotherhood is to stop the abuse of power and to maintain the rights of the people