The practice, or application of Parables have been around for several thousands of years. Christ Jesus maximized Parables-and for very good reasons. This is one way to be wiser than the Serpent, and His seed, while being meek, or under-self-control. Interestingly, the world not only can not understand the Parable, or the definition.
Oftentimes, the most precious, is hidden in plain sight - for those that can discern, or have Understanding. A Parable is an earthly statement, with a Spiritual meaning: also considered an allegory because it can have more than one meaning. The worldly-educated-Hypocrites of Christ Jesus day, could not understand any, or either meaning.
Cain was trained to be a farmer, but was rejected because of his rebellion-to God[Gen.4:11,12]. The ground will not produce for Cain, or his descendants. This group refuse to open their eyes and repent, so Christ talks around them. The Twelve  Tribes that came through Sarah, can and do farm, even until this day.
Matt.13:34 states that Christ Jesus spoke to the multitude in Parables, only! The world doesn't get it: they can not go around Christ: He is the only Savior. Hypocrites will die in their fakeness. Many Parables are given from an agriculture point of view. The man Adam[8th.day formation] was a farmer.
Mark 4 is a Parable of "The Sower". Mark 4:13 is the foundation for all of the other Parables. This one goes backwards to the Garden; which had No apples around. The truth is "X" rated, and for another blog. Mark 4:11 is a Vs. that should be applied, even today.