Growth is considered a spiritual need from a fulfillment standpoint. Tony Robbins has a simple saying: progress equals happiness.
When we are growing or making progress, we have a sense of fulfillment. When we are stagnant, frustration can set in.
Growth is also a law of nature. Living things are either growing or dying. The question for us is whether we choose to stretch as far as we can.
Martial arts training gives students a path to measure progress: new skills, better fitness, stronger focus, and the discipline to keep improving.