Please explain what the paragraph taking about (200-300 word)

topic : how to invest

1. Be Optimistics

1942 when i bought my first stock as an illustration of all the things that have happened since 1942 we've had we've had 14 presidents seven republicans seven democrats we've had we've had world wars we had 911 we had the cuban missile crisis we have all kinds of things the best single thing you could have done on march 11 1942 when i bought my first stock was just by an index fund and never look at a headline never think about stocks anymore just like you would do if you bought a farm you just buy the formula let the tenant farmer run it for you and i pointed out that if you put ten thousand dollars in an index fundthat reinvested dividendsand i paused for a moment to let the audience try and guess how much it amount to and it would come to 51 million dollars now and the only thing you had to really believe in then is that america would win the war and that america would progress as it has ever since 1776 and that american business if america moved forward american business would move Forward you didn't have to worry about what stock to buy you didn't have to worry one day to get in and out you didn't you didn't know the federal reserve would exist whatever it might be and america works.