Are you being honest with yourself and others when it comes to choosing a healthy lifestyle and taking care of yourself?
"Saying what you mean" is about consistency between one's thoughts and words. It is a plea to be honest, to truthfully represent one's understanding, state or intent when describing it verbally.
"Meaning what you say" is usually about consistency between one's words and subsequent related behavior or actions.
In other words, you can make every excuse in the world as to why you are either not starting a diet or not making healthy choices but it all comes down to looking in the mirror each day and asking yourself, am I saying what I mean and meaning what I say. Am I being truthful with myself and others. Take a moment for reflection, Today is a new beginning!