You're absolutely right! This is a fundamental principle in physics called Newton's Third Law of Motion. It states:

For every action, there is an equal and opposite reaction.

Here's how it applies to your question:

* Action: When you push on an object (like a wall), you exert a force on it.

* Reaction: The object pushes back on you with an equal and opposite force.

Why we don't always feel it:

* Mass: The object's mass plays a role. If the object is massive (like a wall), the force you feel back is noticeable. But if the object is light (like a feather), the force is very small and you might not even notice it.

* Friction: Friction between your hand and the object also plays a role. This friction can make the force you feel back seem stronger or weaker.

Examples:

* Pushing a door open: You push the door, and the door pushes back on you.

* Jumping: You push down on the ground, and the ground pushes back on you, launching you into the air.

* Swimming: You push water backward with your arms and legs, and the water pushes you forward.

So, the next time you push something, remember that it's pushing back on you with the same amount of force!