preparing for the Wedding Feast

John 2, 7-8 (highlighting is mine):

Jesus said to the servants, “Fill the jars with water.” And they filled them up to the brim. And he said to them, “Now draw some out and take it to the master of the feast.”

It's interesting and important that we're requested to "fill the jars" - I just read it as "make your complete effort". Only then He will, with His grace, make our human efforts and offering into something acceptable to the Master of the Feast.