我寻找钥匙多年，但门一直是开着的。
I was looking for the key for years, but the door was always open.
生活中唯一的限制是你为自己设定的限制。
The child is not a passive recipient of knowledge but an active participant in the learning process.
儿童不是知识的被动接受者，而是学习过程的积极参与者。