Bruce, who wrote to Kendall and Kylie Jenner, opened up about raising 10 children and the secret to maintaining a long-lasting marriage.
"I have learned so much about raising kids over the last 34 years. You guys are my ninth and tenth children, and my fifth and sixth girls to raise," he wrote to them.
"Your mom and I have been together for 23 years, and our relationship has constantly changed and evolved. But we have been able to make it through those adjustments because of a deep love and caring for each other. We are still as committed as ever."
Bruce offered an important bit of guidance for the two girls in regard to finding their match…when the time comes.
"Go out and find that person who makes you a better person, and vice versa," he said.
You tell 'em, Bruce!
Catch another all-new episode of Keeping Up with the Kardashians this Sunday at 9/8c, only on E!