That ONE INDISPENSABLE Thing

There are many things that we need or want in this life, but if push came to shove, many, if not most of those things we could probably part with.  The same is true as a follower of Jesus. There are many tools, practices and expressions that help me follow and grow, but most, if not all could be left behind. This begs the question, “What is that ONE INDISPENSABLE thing i must have in following Jesus?”