Many commentators believe that when the Lord Jesus Christ said to this man, ‘Follow me’, the man had already given some indication that he wanted to follow him. He was testing him, rather than calling him, because the Lord knows every heart, and he surely would not have called to serve him a man, who had no intention of doing it, who was in a very confused state of mind, who would rather have his family life and his inheritance.
If you're an optimist about spiritual things, you may think just like this man. You may say, ‘I need salvation, I need a new life, but I'm only seventeen [or twenty-five, or whatever]’ and this is something I can put down and pick up at my convenience.’ I kind of believe it, but only in a superficial way. I do believe and yet the seriousness of my position has never struck me: that I could be called before God even tonight, or next week, or next month, and I should be lost. It won't be enough for me to say to the Lord, ‘Lord, I believed in you, but I didn't repent.’ That makes it all the worse for us: that we believed and we didn't repent; we didn't turn. In our optimistic moods we don't see the danger we are in, the seriousness of all this.