“Why do you call me, ‘Lord, Lord,’ and do not do what I say? As for everyone who comes to me and hears my words and puts them into practice, I will show you what they are like. They are like a man building a house, who dug down deep and laid the foundation on rock. When a flood came, the torrent struck that house but could not shake it, because it was well built. But the one who hears my words and does not put them into practice is like a man who built a house on the ground without a foundation. The moment the torrent struck that house, it collapsed and its destruction was complete.”
We cannot come to Jesus and yet not do what he says. Sure, we are 100% saved by grace, but if we are truly saved then we will do what he says. Why's that? Because part of faith is repentance: saying sorry for sins and our rebellion and turning to God and because if we truly love God and trust him we will obey him and put him first. We know a tree is healthy if it produces good fruit. We know a medicine works properly if it does its job and helps heal sickness. We know a Christian by their works, not because their works save them, but because if they are saved they will obey God.
There are two ways to approach our walk with God. The first is like a man who builds his house on the rock. It takes effort, it's inconvenient, but it shows true care and love. If we study God's word and work hard to obey it, it won;t be convenient for us, but it is better. It shows that we genuinely do love God.
The result for the man in the parable is that when the rain and storms come his house remains standing. If we build our lives on Jesus, the rock, focussing on him, working hard to know him, his promises and to obey him then when hard times come, when trials and temptations arise it will be ok. We will rely on God's promises and he will sustain us. This also applies to when Jesus returns and judges the world. If we have based our lives on our faith in him then we will be saved and not condemned (because he has taken our sin and paid the price if we are Christians). Note that it isn't how well he built his house that matters. What matters is that he built it on Jesus. If we live our lives for God's glory and base them on living like Jesus and on God's word then God himself will uphold and sustain us. It'll be harder and less fun and less convenient, but it will last eternally.
Building our lives on The World.
Obviously the opposite is true for the other man. If we don't truly live for Jesus, but just fake it then it won't stand. God knows who truly trusts in him and who the hypocrites are. You can't fool God, so don't fake it. Don't pretend you're following him if you really aren't. Likewise if we base our lives on things other then Jesus then it won't last. The world is full of things that promise much, but just slide away. Money, friends, family, work and so many other things, which are good blessings from God can become our idols. We base our lives on them and they slip away, leaving us with nothing.
When hard times come the hypocrites, who just follow Jesus because it's easier usually fall away. They find it too hard and don't have God's promises to sustain them. Likewise if we trust in the things of this world then it will all crumble when Christ returns to judge. He alone can save, and therefore everyone who has rejected him is still under God's just and righteous wrath.
The question we have to ask ourselves is this: Do I really trust in God? If so, am I building my life on his word and on his promises? Am I obeying him? We aren't saved by what we do, but if we are saved then we will do good stuff because of it to honour our saviour.