I feel that clay can be moulded in whichever way we want when it is wet that is why we say so. But on the other hand we mould ourselves continuously in order to adapt to the surrounding.Then, moulding is not only in context of a child but it is equally applicable for adults.
We think that children are easy to mould because they listen to us and they absorb everything easily whatever we say or do. But as adults we develop some kind of perception which may allow us to mould the way we want.
If we can recogize our strength and weaknesses then I think we will able to evolve in a better way. When it comes to children we only have to give them the right environment and they will mould themselves in the best way.
Here is an interesting quote which speaks all that which is required to blossom.
"DON'T BE PUSHED AROUND BY FEARS IN YOUR MIND. BE LED BY THE DREAMS IN YOUR HEART."
- Roy T. Bennett
I feel we always have a chance to mould ourselves in the best possible way.
All the best