You would notice the joy and comfort of eating the sweet end. If you were to continue eating the cucumber until you finished the bitter end, you would have a very bitter taste in your mouth for long time to come. You would have a hard time to swallow it. By that time you would have forgotten all of the sweet taste that you had enjoyed at the beginning of the sweet taste. It is best to eat the cucumber from the bitter to the sweet end, rather than from the sweet end to the bitter end.
Life is no different than the example of eating the cucumber.
All of us, have the choice in our life. If a person put the effort in their life, and worked hard during their younger life, they will see complication and a hard time establishing their life. Life is nothing but obstacles and trials. There will come a time were that person will be working hard, or going to school and working hard too. At times there will be feelings like their life is very bad and unbearable to continue moving forward.