Knowing danger can occur anywhere, at any time, puts you ahead of most people. This doesn’t mean you’re paranoid. It simply means you’re aware — and take precautions. – Tiger McKee.

Just to reiterate:
You don’t get to pick the day you need your gun. Someone else will pick that day, and they will only tell you at the last minute. -Tom Givens

And to put a sharp point to it:
Matt Graham Combat Killhouse rules:

1. NOBODY IS COMING TO SAVE YOU.
2. EVERYTHING IS YOUR RESPONSIBILITY.
3. SAVE WHO NEEDS TO BE SAVED.
4. KILL WHO NEEDS TO BE KILLED.
5. ALWAYS BE WORKING.