Christ's body was not broken, and the bread of Passover, broken so it can be shared, is a symbol of being joined to His sinless life rather than death.
Was Jesus Christ's body actually broken? If so, it would have symbolized disqualification and a broken covenant. Only the bread of Passover was broken.
A poor spiritual diet will bring about a weak spiritual condition. What the mind assimilates is exceedingly more important than what the stomach assimilates.
Christ emphasizes that the internal, weightier matters, which change the heart, take precedence over external ceremonial concerns that don't change the heart.