Some excerpt from The Kite Runner.
"How long?" Sohrab asked.
"I don't know. A while."
Sohrab shrugged and smiled, wider this time. " I don't mind. I can wait. It's like the sour apples."
"One time, when I was really little, I climbed a tree and ate these green, sour apples. My stomach swelled and become hard like a drum, it hurt a lot. Mother said that if I'd just waited for the apples to ripen, I wouldn't have become sick. So now, whenever I really want something, I try to remember what she said about apples."
Simple things that happen around us, can be the door to a great wisdom.