“The way of the gospel is a simple way. … Humble yourselves and walk in obedience.”

From the Life of Gordon B. Hinckley

https://www.lds.org/manual/teachings-of-presidents-of-the-church-gordon-b-hinckley/chapter-12-obedience-simply-live-the-gospel?lang=eng

This quote could also be used  "Obedience is a choice. It is a choice between our own limited knowledge and power and God's unlimited wisdom and omnipotence." Elder L. Tom Perry , you can download it here: Obedience is a choice...quote