You don't get hurt deadlifting 500lbs. You get hurt putting down a 24lbs kettlebell.
Mindfulness is something that is becoming increasingly more important in our fast paced work. Being present and self-aware are to principles and practices that have a serious place not only in our everyday lives but can be finely honed in the gym.
If we want to continue to have longevity in life and be able to do the things we like to do we need to be mindful of how we move. Far too often we get complacent when we don't take something seriously. If you are very strong you might not think too much about grabbing that barbell out of the stand but if you aren't mindful this is the time when you are most likely to tweak your back because you aren't aware just how disorganized your position is when doing so.
Here is an example of an organized position vs. a disorganized position:
When moving anything (a barbell, a kettlebell, your body) pay attention to what is happening. Is your care tight? Is your spine in a good position, is the load in an optimal position? These things will help keep you safe in the gym and the principles of bracing and position can then be carried out into the world where you spend most of your time anyway.
Be mindful of how you move.