When a child enters your life, most probably you might think it's time to teach all that you know. But the fact is that you need to understand it's time to learn from the child! It is time to learn about the life you have forgotten.
You had become like a zombie and this little bundle of joy entered your life and without knowing, you started laughing, without knowing you started singing, without knowing you crawled under the sofa along with the child. Life is happening because of him, not because of you.
So, don't do any upbringing. Upbringing is the problem. Don't try to bring up your children. There is no need to bring them up. If you just create a loving and supportive atmosphere, they will grow up well. It's just like growing a plant in your garden. You just see that the atmosphere is fine; the plant will grow to its full capacity. If you go and meddle with it every day, it is not going to grow. Freedom and space is an absolute must for all --- be it plants or little kids. The more they are left free, the more they struggle and learn, and better they are to face life.
So, leave your children alone. Just create a loving and supportive atmosphere in the house, that's all your business is. Just make sure your children never get to witness what it means to be angry, never get to witness what it means to be miserable, never get to see what it means to be frustrated. That's all.
You just see that the house is filled with joy and love, they will grow up beautifully. They don't need you, they need your love. Your business is just to create the atmosphere, not to teach them your nonsense.
If you make sure that you don't mess up with them, if you make sure that your influence is not too heavy upon your children, they will be fine. And you will see them growing fast and healthy. What else do you ask for?