My sister is in depression thinking negative about everyone and everything. How should I handle her?

In general, I can say that normally people think that they should want an ideal life. A woman wants an ideal husband and an ideal family etc. which is not possible in this world. If this law of nature is understood, there will not be any such stress. I read in the newspaper that Shahrukh Khan travelled to America and for two hours he was detained and checked. People created a lot of hue and cry that Americans should seek forgiveness. I thought that Shahrukh Khan and all others should think that it was only for two hours but soon a day will come when I will be checked for everything and so I should pray that the same happens in the hereafter and we get past quickly. It is because of these things that people take negative lessons. A positive person is one who takes a positive lesson from such instances.