Theophylact of Ohrid — as excerpted in the Catena Aurea on Luke 19:1-10

“It is easy to turn this to a moral use. For whoever surpasses many in wickedness is small in spiritual growth, and cannot see Jesus for the crowd. For disturbed by passion and worldly things, he beholds not Jesus walking, that is, working in us, not recognising His operation. But he climbs up to the top of a sycamore-tree, in that he rises above the sweetness of pleasure, which is signified by a fig, and subduing it, and so becoming more exalted, he sees and is seen by Christ.”