Why do we not see our Breath on a warm day?

Our Breath is warmer than the air outside. Sometimes the air outside is so warm that it does nothing in particular to that gaseous water or water in the form of a gas, which is al- ways in our breath; and so, we see nothing.

But on a cold day this gaseous water as it leaves our bodies, is suddenly turned so cold that it forms a little cloud, made, like other clouds, of drops of water.