This text was prepared to coincide with the average citizen's conventional lifestyle. Minimum preparation, however, should take no less than 1,500 hours. Even if spread over the course of several years, this is a formidable amount of time. If you believe you can accomplish everything by "cramming" at the eleventh hour, by all means, don't lift a finger now. But you may think twice about beginning to build your ark once it has already started raining.