Curious Case of Sowing and Reaping

We have all read the scripture of God providing seed for the Sower. Early on we read in Genesis the sad story of Cain. In that account we discover the the negative side of sowing and reaping. It seems at times that the person has gotten away with many sins, however, we know that unless they settle accounts with God, they will one day reap a terrible harvest. However, for those who do good things; they too seem as if the good harvest they expect will never come. However, the good harvest will come.