Favell Lee Mortimer emphasizes the importance of watching and being prepared for the Lord's second coming, comparing it to the uncertainty of the day of death. He warns against growing weary of waiting for Christ's return, as he has promised to come. Mortimer highlights that just as death often comes unexpectedly, so will the Lord's return, creating more alarm than death ever could. He stresses the need for readiness and finding refuge in the Lord Jesus to escape the terrors of that moment.

Why did the Lord conceal from all the time of his second coming? We know not why he concealed it from angels or from devils, but we do know why he concealed it from men. It was that they may be watching for his return. He said, "Watch, therefore, for you know not what hour your Lord does come." He who made us is acquainted with all the secret springs of our nature. He knows that when we have a long time before us, we are disposed to loiter. There is a spirit of sloth and delay that steals over our hearts, which nothing overcomes so much as the idea that the opportunity for exertion may soon be past. Though our Lord may appear to tarry, we must never cease to believe that he will soon come. As it is written, "For yet a little while, and he who shall come will come, and will not tarry." (Heb. 10:37.) When we have been expecting a friend for a long time, we at length grow weary of waiting, and "give him up." We say, "Surely now he will not come at all." Yet sometimes he arrives just as we have given him up. We must never give up expecting Christ, for he has positively promised that he will come. But he has not promised to prolong our lives until his return. Millions have dropped into the grave during his absence, and it is very probable that we may descend into ours. The day of death is as uncertain as the day of his return. The young die as well as the old, the healthy as well as the sickly, the cautious as well as the adventurous. We all know that this day we MAY die. It does not require faith to believe that we may die; for reason convinces us of this fact. Yet is it not remarkable that death generally comes unexpectedly—even to the old? They have lived so long, that they naturally imagine they shall live longer still. They have seen the arrow of destruction pass by them so often, piercing their companions, but sparing them, that their fears are quelled, and their hearts are lulled to repose. It often happens that just as men have made their plans for long life, they are visited by sudden death. A house has just been built, and a garden planted, when he that built and planted is called to dwell in another abode, and to walk in other regions. These unexpected removals say with a loud voice to the living, "Be you also ready." But what if, instead of death, the Lord were to come? His return would create more alarm than death has ever done. When death attacks an ungodly man, his senses are often stupefied by disease; he is less capable of feeling alarm than when in full health. But when Christ returns, he will find his enemies lively and strong. A sick man usually entertains hopes of recovery until near his last hour; but when Christ returns, the wicked will see no way of escape. Friends surround the pillow of the dying man; some soothe and flatter him, some counsel and encourage him—but when the Judge appears, the wicked will be left to meet their dreadful fate, without one friendly arm to render aid, one pitying eye to shed a tear, one godly tongue to offer a prayer. Do we desire to escape the terrors of that dreadful moment? there is but one certain refuge. It is the Lord Jesus, who is now ready to hear our prayers, to forgive our sins, to bestow his grace, and to be our hiding-place in the day of trouble. If we neglect this precious opportunity, he will come on us as a thief, and we shall not know what hour he comes upon us. (Rev. 3:3.)