Hi, we're the Tus ✌️

Two imperfect people, one shared mission.

We didn't start the Mustard Seed Letters because we had it all figured out. We started it because we didn't — and we suspected we weren't alone.

This is our story. The messy, honest, still-in-progress version.

Our Story

Josh Tu

Josh Tu

Huband, Dad, and Engineer

A work-in-progress to balance working hard for my family’s future while cherishing the precious moments today.

For the past six years, I’ve worked as a mechanical engineer across major tech companies. I took pride in going the extra mile and poured everything into my career. That hustle felt honorable—like the ultimate way to provide for my family. 

But as late nights and voluntary weekend hours became my norm, I lost the ability to turn off work and be present at home and with my loved ones. I had been so consumed with providing for our future that I was forfeiting our present...

Thanks to my wife’s unwavering determination to fight for our marriage—and mentors who poured their hearts and time into guiding us—I began relearning what it truly means to be a present, supportive husband.

Writing Mustard Seed Letters serves as a constant nudge for me to reflect and grow, and I hope it encourages anyone walking a similar path to join us.

Danielle Tu

Danielle Tu

Wife, Mom, and Therapist

A work-in-progress to guard my heart for what is most precious: God, my husband, and my family

I preached to myself that I was doing all the right things and that it was my husband who needed to change. 

Afterall, I was the one feeling neglected, rejected, and powerless. The expectations I had for this marriage crumbled, so I welcomed others into the sacred space of my marital issues in hopes of finding help.

However, in this process, I stumbled into emotional infidelity which lasted two years. Through a series of painful but much needed events, God reminded me of my wedding vows. 

I realized saying yes to my husband meant saying no to all others. It was humbling to admit that I did not have all my stuff together like I had thought! 

Mustard Seed Letters is centered around speaking honestly about struggles and shortcomings so that God can do a new thing, better than we could hope for or imagine. 

Writing Mustard Seed Letters is a reminder to guard my heart in my marriage and to focus on my family.

Our Core Value

"The kingdom of heaven is like a mustard seed, which a man took and planted in his field. Though it is the smallest of all seeds, yet when it grows, it is the largest of garden plants and becomes a tree, so that the birds come and perch in its branches."

— Matthew 13:31–32

This is the foundation of everything we do. We believe in the power of small things — small letters, small questions, small acts of care — that, with patience and grace, grow into something that provides shelter and strength for the people we love.