when parents become old...

Every body loves their parent. But, some people treat their parent badly when they become old. It depends on our sanskars. I'll tell you one story from Indian mythology.

In ancient India, there was a boy Shravan. He worshiped hid parents more than god and was very much devoted to them. They were old and hardly able to move. They were not able to see also. They thought, now we are very old, so we should go on a pilgrimage before we die. They were poor, so couldn't afford carts or horses, so Shravan decided to take them by a kavad. Shravan carried the kavad on his shoulder. On one side his father was seating and on the other his mother. When they reached Ayodhya, they stayed in a forest to drink water. Shravan went to the Sharayu river nearby and started filling water in his pot. Ayodhya's king Dashrath was in that forest that day for hunting. He heard the sound of pot and thought it's an animal, so he shot Shravan with his arrow mistakenly. Shravan died, but before that, he told Dashrath about his parents. Dashrath offered them comfortable stay in his palace. But they refused and died in sorrow of Shravan.

Till this moment, Shravan is the best example of ideal son I heard of.

In sanskrit, a verse is there : ' MATRUDEVO BHAVA, PITRU DEVO BHAVA'. Means mother and father are like God to us.
There are many national heroes, who did great things because of there parents' lessons. Shivaji, Swami Vivekanand, Lal bahadur Shastri are some examples.

Parents teach us so many things. They do everything for us. We owe manythings to them. They not only give us birth but care for us throughout their life. They teach us the basics, so that we can leave in this world. They lay foundation of our career. They are happy, when we are happy. They cheer us up, when we are sad.

So, worship them like god, because they ae the most important persons for us in the world.