Did you know that Noah left the door of the ark open after he and all the animals got in? For seven days before the rains came, the door was wide open—still time to get on board (Gen 7:4). Evidently there was enough room for 11th hour converts.
But all those people who stood there looking at the open door of the Ark had hardened their hearts after watching Noah build for 120 years. Wouldn't they have had some doubts after seeing it finished? And even seeing the animals march into the Ark, two-by-two, you would think they should realized something extraordinary was going on. But they ignored all the signs, and instead went on living their lives, eating and drinking and marrying.
Incredibly, even on the last day, they could have been saved. An open door; why didn’t they come? “And just as it happened in the days of Noah, so it will be also in the days of the Son of Man” (Luke 17:26). Jesus told His followers that there will be clearly identifiable conditions on the earth at the time of His coming, just like those in the days of Noah. Remember the people in Sodom and Gommorah? They too were too busy to pay attention: eating and drinking, buying and selling, planting and building. Sound familiar?