I’ve always found this question fascinating. If you are on fire for God why would you (and I don’t mean you personally) want to do the minimum? I can promise you whatever the minimum is God expects you to do more than just the minimum.
I can give a very easy answer to why one would want to the minimum? And this is based on my own personal experience. If you came to faith through fear of Hell, it would lead one to want to do just the minimum.
For instance, for me, I came to faith after reading the
Left Behind series (or at least, it was reading LB that caused me to consider Christianity as worth checking out). I hear many people say that they came to faith because they wanted nothing more than to know God. For me, it was I wanted nothing more than to get-out-of/stay-out-of Hell.
Within me, this did not breed a desire to serve/love God. It created fear (I always wondered whether I was Saved or not and it didn’t help that there are many pseudo-theologians out there who use fear as the basis of preaching/spreading-the-Gospel). The main question for me was what do I need to do to stay out of Hell?
Compare it to the person who puts a gun to your head and says, “Do what I say or else.” You’ll probably do what they tell you, but you aren’t going to go any extra miles for them. You’ll look for the minimum that will keep you from getting shot and do that.
Granted, this is a faulty comparison because we are sinners, but it still comes down to one of two choices: A) Accept Jesus as Savior (we can discuss what this means) or B) Go to Hell.
Do you understand how, from this point-of-view, you could have someone who sincerely believes, but is not motivated beyond the minimum? Obviously, this shows the problems with fear-based evangelizing.
More than belief is necessary for salvation. Jesus summarized it in the two great commandments. Everything else is, or should be, aimed at helping us obey them.
But is Salvation connected to the two commandments? I tend to take a fairly legalistic view on how Salvation works. By this I mean that, within Scripture, I try to be careful about not connecting things to Salvation. I guess I have dealt with too many who play loose on this and it always ends up in a works-based Salvation. After all, you see the so-called Lorship Salvation proponents arguing that unless someone makes Jesus ‘Lord of their life’ and forsakes everything, they can’t really be Saved. This ‘Lord of your life’ stuff comes from bad exegesis of Romans 10:9 and the word ‘kurios’ which is translated as Lord. From my understanding, confessing Jesus as Lord was not some meta-physical spiritualized thing, it was affirming that Jesus is God (‘kurios’ is used in the Septuagint as a title for God). And ‘forsaking everything’ is connected to discipleship, not Salvation (or eternal life as Jesus terms it). In the Greek, the word used for disciple is ‘mathetes’ and the word(s) for eternal life is ‘aionios zoe’ (both translations are according to Strong’s Concordance). Another example of problems caused by playing loose with Scripture is how the Baptists think drinking alcohol and dancing are sinful.