Nothing is so strong as gentleness, nothing so gentle as real strength. True strength is not about how much weight you can lift or how far you can run, it is about how gentle you can be when the situation calls for it. Some people mistake gentleness for weakness but this is far from the truth. It takes a very strong person to be gentle when the world is watching, without worrying about how others may perceive this or losing reputation as someone who is incredibly strong.
A great person understands that strength and gentleness are two sides of the same coin, and you must have both in order to be a good person and live a good life. Being strong without the capability for gentleness means being a failure and refusing to understand what true strength really means or how it is achieved.