We hear about so many natural and unnatural calamities. Can we do anything about it? No, we can hardly do anything to stop it. But we do hear some people have scaped it, whereas some were caught in it. It is like a chopper coming to rescue people. there are some people who reach the place before it takes off. Opportunity is there but only some of them are able to avail it. Meditate to hear the first knock by opportunity.