A couple invited Jim Harbaugh to their wedding in May, and the eccentric coach did not disappoint.

Harbaugh wrote newlyweds Seth and Kristen a letter in which he left the couple with some sage advice.

“Attack every day with an enthusiasm unknown to man,” he wrote.

Sound familiar, Michigan fans?

Here’s the full card:

It’s great advice, and it’s exactly the type of advice you’d expect Harbaugh to give to a newly married couple. We wish Seth and Kristen the best of luck.