Hmmm... Newton's 3rd Law... Every action has an equal and opposite reaction. EQUAL AND OPPOSITE. If you push on a wall with 500N of force, how much force is acting on you? If you push on someone using the same amount of force, and they stand like an inanimate object grounding the force, how much force is acting on you?

Where is the resistance?

It's not rocket science... er... wait a minute... it IS rocket science...