Bonding/Anti-Bonding Orbitals?

[MissionStanford]

How can bonding and antibonding orbitals exist at the same time if bonding orbitals are formed by constructive interference and antibonding orbitals are formed by destructive interference? Wouldn't that mean that two opposite types of interference have to occur simultaneously? How would that happen?

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[milski]

The orbitals are just places, not physical objects. The interference happens to any electrons occupying this orbitals. It's just a fancy way of saying that if you arrange electrons in a certain way, they'll tend to stay that way or will fly away from each other and leave the configuration.