I'd say it's harder to play with an acoustic guitar strapped over your shoulder for a few hundred people than it is to play in front of thousands with an entire bombastic band behind you. After all these years, I still get nervous in front of people. I can't help it.
When you've worked hard, and done well, and walked through that doorway of opportunity...you do not slam it shut behind you...you reach back, and you give other folks the same chances that helped you succeed.
But now I know that there is no killing A thing like Love, for it laughs at Death. There is no hushing, there is no stilling That which is part of your life and breath. You may bury it deep, and leave behind you The land, the people that knew your slain; It will push the sods from its grave, and find you On wastes of water or desert plain.
If in physics there's something you don't understand, you can always hide behind the uncharted depths of nature. You can always blame God. You didn't make it so complex yourself. But if your program doesn't work, there is no one to hide behind. You cannot hide behind an obstinate nature. If it doesn't work, you've messed up.
Keep your face always toward the sunshine everything could be worse but isn't and so we are justified in being grateful - and shadows everything could be better but isn't and so it is easy to be bitter 'unless you decide to look on the bright side will fall behind you.