Obedience as an act of worship (pp72-73)

This is the first installment of my Thinking Out Loud series on The Purpose Driven Life. I reviewed the book here https://www.goodreads.com/review/show/973038551?book_show_action=false but also decided the best, most thorough way to deal with this book was to blog through my reactions. Warren claims obedience to God is an act of worship. However, I this this is a stretch. Sure it brings pleasure to God. Worship is adoring reverence, respect and awe. I don't think obedience can be put on that level. If it is then how do we draw the line between obedience to God as worship but obedience to someone else is not worship? (I know my kids' obedience is NOT an act of worship). Besides, we are to only worship God—no one and nothing else.