Jesus recalls the Old Testament images of Noah and Lot to remind us that, in the time of judgment, those who live according to God's word will be saved, while those who give themselves to worldly things and forget about God will face the judgment.
Jesus warns us that, if we are not prepared for it before it comes, judgement will come so suddenly that we will not have enough time to prepare. So we should live our lives in ways that prepare us for the coming of the Son of Man.
Reflect on your life and consider what you give most importance to, what will most help you to prepare to face the judgment day. Jesus speaks about the judgement in this way, not to frighten us but to help us to be aware.
Imagine that, while you are reading this reflection, the Son of Man comes. The suddenness of his coming leaves no time to ask for forgiveness, to forgive others, to be reconciled with your children, to tell your father that you love him, to help the poor and those in need.
Reflecting in this way will raise one's awareness of how to use time wisely to prepare well for judgment.
Lord, grant us the grace to face the Day of Judgement without fear or regret.