And that means that our whole waking life is affected.  There are some who complain that the Christian religion is irrelevant.  On the contrary, the Eucharist makes it most uncomfortably relevant.

If there is something in our life which is unfit to be offered to God, then its place must be taken by a sincere act of penitence for it.  That at least shows a willingness to make our offering in some sense worthy. 

Unhappily, real penitence is rare, for many people are so attached to their sins that they have no wish to give them up.  Consider, for example, vindictive, malicious, unforgiving thoughts; or the pleasure of reading about human wickedness.  How few there are who loathe such things, compared with the many who persist in them, come what may.