It's Ryron and Rener Gracie sharing some wisdom. Not only is their advice good, but the fact that they came up with the question in the first place is to be applauded.
Why do people give up training? Who is it that gives up? When do they tend to do it? What's going on?
Of course for many people, martial arts do not become an important part of life. Training does not develop into a passion nor do they maintain a curiosity over time about this fascinating subject. But even for those that find the commitment and consistency to train to a high level often give up at a certain point too.
I know personally, that I HAVE to keep moving. My body feels better, and my mind is clearer. My brain is engaged and is more creative when I am training, and the constancy of the training itself is like a meditation, a calm foundation perhaps, for the ups and downs of life. I want to keep doing it, and lucky for me, my chosen arts make this physically pretty easy to do even into an advanced age. BJJ is much harder on the body, but still, it turns out it's the mindset that is the key. What a surprise :-)
Anyway, these 2 guys, still young, still at their peak, have thought deep and come to some major realizations. Good for them.