system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:How can the Earth's gravity be a strong enough force to hold the moon in orbit, and the oceans down, yet be a weak enough to allow me to raise my arms?
gpt
Two reasons here:

First off, look at it the other way around.  Earth's gravity isn't weak, you are just incredibly strong!  We all are, because we casually overcome gravity all the time.

Also, the equation governing gravitational attraction between two bodies is proportional to the mass of those bodies.  Your mass is itty-bitty and so the force of attraction between you and the Earth isn't as strong as it is between the Moon and Earth.