Whosoever believeth that Jesus is the Christ is born of God: and every one that loveth him that begat loveth him also that is begotten of him.
By this we know that we love the children of God, when we love God, and keep his commandments.
For this is the love of God, that we keep his commandments: and his commandments are not grievous.

No servant can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.

I know thy works, that thou art neither cold nor hot: I would thou wert cold or hot.

COMMENTARY

We keep his commandments: and his commandments are not grievous
There are two types of disciples: those that are social disciples and those that are actually disciples. Social disciples maintain a connection to the environment of the gospel. They like the culture that surrounds it, but they aren’t very devoted to the actual doctrines being taught. They are afraid of judgment, and because of that try to keep the commandments, but have little love for them.
I have certainly been one of these social disciples. I was raised in a gospel-centric home, and that made it easy to take my beliefs for granted. Of course I was a Christian, it was all I knew, how could I possibly be anything else?
But then passages like this one from John stuck with me, because absolutely there were commandments that felt grievous to me. Since I was convinced that I was already best pals with Jesus, I didn’t feel any need to know him better. And because I wasn’t actively trying to know him better, there were all manner of vices that I was susceptible to.

No servant can serve two masters
I would thou wert cold or hot
For a long time I was too terrified to admit that I wasn’t really a Christian in my heart, just someone who happened to have a lot of trivia knowledge about Christianity. But frankly, once I was able to admit that I was “cold” in my discipleship, then at last I could begin looking for ways to bring my temperature up.
Furthermore, I found that God wasn’t disappointed by my admitting that I wasn’t following him very well. Quite on the contrary. He was already abundantly aware of my tepidness, and thrilled that I was finally ready to do some honest work.