In Luke 8:4 Jesus shares the parable of the sower. Jesus tells of how a farmer spreads seed. Some falls on beside the road and is trampled or stolen by birds. Some falls on rocky soil and grows quickly, but withers quickly because it has no root. Some falls in the soil where there are thorns and grows well until a certain point and then it is choked out. Other seed fell on good soil and grew and produced much fruit.
Jesus later explains this to the disciples. He says that the sower is God and the seed is the word of God. Those on the side of the road are those who have heard the word but devil comes and steals it from their heart so that they can’t be saved. Those on the rocky soil are those who receive the word with joy, but then, because they have no root, when tempted fall away. Those who are among the thorns are those who receive the word and grow but are choked out by the worries, riches, and pleasures of this life and don’t produce fruit. The final group are those who receive the word with an honest and good heart, hold fast and produce much fruit through perseverance.
This is a tough parable for a lot of reasons. First, it appears that only 25% of people end up producing fruit. Although to be fair, it doesn’t say anything about percentages. Heck 90% of the seed could have fallen on any one of the soils. But as someone who has tried to spread the word to people for over two decades, it sure does seem like 25% of people being the good soil seems about right.