When you think of strength, the first thing that might come to mind is that of some burly individual able to pick up heavy weights. And though that may be a legitimate mental picture, strength goes beyond the ability to lift heavy objects. But since that may be your mental picture, let us start with the body.
Strength of Body
What are the benefits of a strong body? The stronger you are, the easier it is to complete physical tasks with more efficiency. This could be climbing the stairs with less discomfort. It could be carrying the groceries from the car to your kitchen with less struggle. Being strong gives you the freedom to accomplish the things that needs to get done without undue taxation on the body. The building of strength today benefits what you can do tomorrow.
Strength of Mind
Can you push through the barrier past the pain of exhaustion? As much as you need a strong body, you need to develop a strong mind. You must be able to will yourself to go farther than you think you can. I can’t count how many times I have wanted to give up while running. My mind is looking for ways to get me to stop. It is looking for the smallest reason to use as weapon against me in the game of mental warfare. The body is willing and capable, but the mind needs conquering. As Zeno said, “Man conquers the world by conquering himself.” The way to do this is to train your mind to overcome adversity.
Strength of Soul
I am reminded of the monk who sat still in the middle of the road as he burned to death. Both his body and mind were strong. But to willingly cross the threshold of death with the knowledge that there is no coming back to the body, that takes a heart and a soul of immense strength. I don’t recommend you try it, but you can learn to challenge your fear. You can incrementally increase your courage.
You cannot use the strength you do not have. If you want to be strong, you must develop it. And like a three-legged stool, each leg must be trained equally. If not, you will topple over.
How does this relate to the virtue of Justice? To do what is right requires strength. Strength then is a virtue, and one that we can all strive towards.