When we find the treasure hidden in a field in the kingdom of heaven, we have to buy the whole field to possess the treasure. This field is not a beautiful, smooth, green meadow with a trickling brook. Instead, this field of the kingdom usually has some stumps, stones, and holes that need to be taken care of. We have to be diligent to maintain regular routine maintenance of the field in the kingdom of heaven, otherwise thorns and thistles will grow up to choke out the fruit in the kingdom.