One day, husband and wife will grow old together, cross the boat forever, and sleep forever.

It means: one day for husband and wife is a blessing for many generations of practice.

A hundred years of practice, let you cross the transition together.

After a thousand years of practice, you can share the same bed.

Note: "EMI" and "Chiyo" here do not refer to EMI and Chiyo. They are all used to describe "a lot", but one thousand is definitely more than one hundred.