Having a root means that you are comfortable sinking all you are through your legs and into the Earth. It seems to require physically strong legs, but it is more the mental strength to accept that you are nothing more than that root. Any desire to be special, any feelings of inflated self-worth, and the legs will push up into your chest. A heart at peace is not just an empty heart, but a connected heart, content to be simply channel. A humility that inevitably comes when real life rubs against you for any length of time.