 Yeah, good point. So if you're wondering how do you fix cracks like these, they're not DIY projects, right? What you can do is seal to stop the water. If it's a crack that's maybe an eighth to a quarter inch wide, you can seal it with a silicone caulk and then monitor it for movement. If it's horizontal, fix your drainage. It could be collecting water against the outside, breezing and pushing it in. Or if you're just not sure, get an inspection by a structural engineer or a professional home inspector.