Jesus said, “But about that [judgment] day or hour no one knows, not even the angels in heaven, nor the Son, but only the Father. As it was in the days of Noah, so it will be at the coming of the Son of Man. For in the days before the flood, people were eating and drinking, marrying and giving in marriage, up to the day Noah entered the ark; and they knew nothing about what would happen until the flood came and took them all away. That is how it will be at the coming of the Son of Man. Two men will be in the field; one will be taken and the other left. Two women will be grinding with a hand mill; one will be taken and the other left.

“Therefore keep watch because you do not know on what day your Lord will come. But understand this: If the owner of the house had known at what time of night the thief was coming, he would have kept watch and would not have let his house be broken into. So you also must be ready, because the Son of Man will come at an hour when you do not expect him. (New International Version)

The best way of observing the first advent of Christ, his incarnation, is by preparing ourselves for his second advent, his return to the earth.

Just because there is sun today doesn’t mean everyday will be that way. The storm clouds are gathering; the Day of the Lord is at hand. Will you be ready?

Satan once called to him some demons of hell and said he wanted to send one of them to earth to aid women and men in the ruination of their souls. He asked which one would want to go.

One creature came forward and said, “I will go.” Satan said, “If I send you, what will you tell the children of men?” He said, “I will tell the children of men that there is no heaven.” Satan said, “They will not believe you, for there is a bit of heaven in every human heart. In the end everyone knows that right and good must have the victory. You may not go.” 

Then another came forward, darker and fouler than the first. Satan said, “If I send you, what will you tell the children of men?” He said, “I will tell them there is no hell.” Satan looked at him and said, “Oh, no; they will not believe you, for in every human heart there’s a thing called conscience, an inner voice which testifies to the truth that not only will good be triumphant, but that evil will be defeated. You may not go.” 

Then one last creature came forward, this one from the darkest place of all. Satan said to him, “And if I send you, what will you say to women and men to aid them in the destruction of their souls?” He said, “I will tell them there is no hurry.” Satan said, “Go!” (C.S. Lewis, The Screwtape Letters)

Most people’s crime in not some gross sin, but indifference, without much thought to a coming judgment. It seems we are all spiritual procrastinators. Why do today what we can put off till tomorrow? 

But the spiritually indifferent won’t know what hit them. 

So we need to be deeply concerned for the coming Day of the Lord, which may be very soon. 

The question for us is not, “When will Christ return?” Rather, the question is, “Are you ready for Christ’s return?” We must:

• Keep watch, stay alert, and be ready, like a watchman on an ancient city wall scanning the horizon for an advancing army.
• Remain vigilant and not forget that Jesus is coming again. 
• Live every moment of our lives in light of the promise of Christ’s return. 
• Be busy (not busybodies) because we don’t know the day of Christ’s second advent.

What does it mean to keep watch, be ready, and stay alert? 

In between these two advents of Christ, believers are to bear witness to a world going about their merry way unaware of the judgment that is about to overtake them. Like Noah, we actively build the ark of the church instead of living as if Jesus weren’t coming.

Noah was a preacher of righteousness in both word and deed, building an ark in a place and around a people who had never seen rain. What’s more, constructing the massive ark took a solid one-hundred years. This was no easy feat.

Like Noah, we must plug away and be faithful stewards, doing the tedious and patient work given to us. We aren’t supposed to be like the irresponsible teenager who, when given the responsibility of watching over the house while the parents are gone for the weekend, throws a big party and trashes the place. The parents will come home at a time that the teenager does not expect, and then there will certainly be weeping and gnashing of teeth. 

When the Lord returns, we don’t know who will be taken and who will be left. Two different people might look the same on the outside, doing the same work, but each of those persons working side by side can really be very different on the inside. So, let us be patient as we await the coming of Christ and avoid losing sight of what is truly important.

One day a man named Denis Waitley was trying to catch a flight but running late. So he literally ran through the airport terminal and got to the gate the split second the flight attendant closed the door. Denis explained his situation, that he had a speaking engagement and needed to be on that flight, but the attendant didn’t budge. 

Denis stormed out of the boarding area and back to the ticket counter to register a complaint and reschedule his flight. His anger intensified as he waited for more than twenty minutes in a line that barely moved. Just before he got to the counter an announcement over the intercom changed his life. 

The plane he missed getting on, Flight 191 from Chicago to Los Angeles, crashed on takeoff and killed every person on board the plane. Denis Waitley never registered his complaint. In fact, he never returned his invalidated ticket.

He took the ticket home and pinned it on a bulletin board in his office to remind him whenever he got frustrated or upset that life is more than day to day impatience and worry and complaints. It’s about serving a lost world destined to slide away from God apart from the grace that can turn judgment into blessing.

It could be today. Every day we must live with the reality that Christ’s return is imminent. Until that happens, we are to be faithful servants of God by serving a world that is tremendous need of getting on the ark and being saved from the judgment that will come. 

Almighty God, give us grace to cast away the works of darkness, and put on the armor of light, now in the time of this mortal life in which your Son Jesus Christ came to visit us in great humility; that in the last day, when he shall come again in his glorious majesty to judge both the living and the dead, we may rise to the life immortal; through him who lives and reigns with you and the Holy Spirit, one God, now and forever. Amen.