Rifle Safeties Don't Replace Safe Handling
Use your safety...but remember that some guns have been fired accidentally even with the safety on! Never test your safety with a loaded gun.
The safety is not a substitute for common sense! You are the only one who can really keep a rifle, shotgun, or handgun safe. Keep the muzzle pointed in a safe direction at all times. Keep your fingers away from the trigger until you are ready to shoot. Keep the chamber empty until you are ready to shoot. You are the best safety!