Place one hand gently on the chest, the other firmly on the belly, and relax the mind. You will feel the heart endlessly emptying (hollow chest) and the belly endlessly filling (relaxed dantien). This is the opposite process to the usual one where the belly tightens with anxiety, the energy rises, and the chest swells and hardens with ego. The honesty we talk about, which could also be called maturity, is just the refusal to brace the heart.