A colorless, tasteless, odorless, gaseous element occurring in the free state in the atmosphere, of which it forms about 23 per cent by weight and about 21 per cent by volume, being slightly heavier than nitrogen. Symbol O. Atomic weight 15.96.
If your oxygen mask drops down, it's time to take a breather! Richard Simmons
Why, for example, should a group of simple, stable compounds of carbon, hydrogen, oxygen and nitrogen struggle for billions of years to organise themselves into a professor of chemistry? What's the motive? Robert M. Pirsig
Insurgencies are easy to make and hard to stop. Only a few ingredients need to combine to create an insurgency; like oxygen and fire, they're very common and mix all too often. The recipe is, simply, a legitimate grievance against a state, a state that refuses to compromise, a quorum of angry people, and access to weapons. Richard Engel
When you really listen to another person from their point of view, and reflect back to them that understanding, it's like giving them emotional oxygen. Stephen Covey
The sun is always shining. We have oxygen, trees, birds. There's so much good things on Earth, still. We haven't destroyed everything. Ziggy Marley