The Sower And The Seed
In the story, a sower sows seed and does so indiscriminately. Some seed falls on the path (wayside) with no soil, some on rocky ground with little soil, and some on soil which contained thorns. In these cases the seed is taken away or fails to produce a crop, but when it falls on good soil it grows, yielding thirty, sixty, or a hundredfold.
Jesus then (only in the presence of his disciples) explains that the seed represents the Gospel (the sower being anyone who proclaims it), and the various soils represent people's responses to it (the first three representing rejection while the last represents acceptance).