The ideal business is one that earns very high returns on capital and that keeps using lots of capital at those high returns. That becomes a compounding machine.
If you expect to continue to purchase stocks throughout your life, you should welcome price declines as a way to add stocks more cheaply to your portfolio.
The best business returns are usually achieved by companies that are doing something quite similar today to what they were doing five or ten years ago.
For some reason, people take their cues from price action rather than from values. What doesn't work is when you start doing things that you don't understand or because they worked last week for somebody else. The dumbest reason in the world to buy a stock is because it's going up.
We are growing the economy in smart ways and rebuilding our infrastructure and investing in science and development and that we stay true to those values that helped to get us here.