"Couche après couche, cela devient de plus en plus profond."

Simplified Meaning:

Think about digging a hole in the ground. At first, you only go a little bit into the earth. But if you keep digging, the hole gets deeper and deeper. The more you dig, the more layers of soil and rock you uncover. This is a lot like learning or understanding something complicated. When you start learning about a new topic, your understanding might be shallow and basic. But as you study more, you find out new details and deeper meanings. For example, if you begin cooking, you might start with simple recipes. As you get better and learn more techniques, your cooking becomes more complex and advanced. This shows that the more effort and time you put into something, the more you discover and understand about it. This advice can help in many areas of life, reminding us that patience and persistence are key to gaining deep knowledge and skill.