The kingdom of heaven is like a professor who went off on a long sabbatical. Before he left, he called together his graduate students and gave each of them projects to work on; to one he gave five projects, to another two, and to another one, each according to their ability. The one who received five projects immediately went to work, designing experiments, building equipment, and analyzing data. She worked long and hard, and eventually she achieved good results on each project. Likewise, the one who received two projects immediately went to work, and eventually got results as well. But the student who received one project was easily discouraged, got distracted by her coursework, and eventually gave up.

After a very long time, the professor returned to settle accou…