"Between these two parables [1] are six parables that reveal new truths about God"s kingdom. Jesus called them "the mysteries of the kingdom of heaven" ( Matthew 13:11). These new truths revealed that a new age would intervene before the millennial kingdom would come; this new age is the present church-age dispensation. Because Israel refused to accept Jesus as their Messiah, a drastic change was made in God"s prophetic program occurred. Whereas the kingdom had been proclaimed as near, now a formerly unpredicted period of time would intervene before the kingdom would come. These parables contain truths not seen in the Old Testament." [2][source]
"The parable of the sower shows that though the kingdom will now make its way amid hard hearts, competing pressures, and even failure, it will produce an abundant crop. But one might ask whether Messiah"s people should immediately separate the crop from the weeds; and this next parable answers the question negatively: there will be a delay in separation until the harvest." [2]7 [source]