It's easy to get the impression that how your child turns out is entirely up to you. Do a good job, and you will have a good child. But are you at fault if your child learns to talk later than other children or has more temper tantrums? Is this something you can control?
The truth is, some children are simply more difficult to soothe, more fearful, more reckless, more intense, or in other ways more challenging for parents. If you are lucky, your baby will have a temperament that fits well with your expectations. I am not so lucky, I have to think in different ways to learn special skills in order to help my child thrive. For example, how to help an extra careful child begin to take small risks.
I have learned that I can't control development of my child's personality but by first accepting who my child is, I can then best shape her development. Children need to feel accepted. Only after that can they work together with their parents to handle themselves in more and more effective ways.
Kids are who they are. You can help them and guide them and do your best, but at the end of the day, they are their own person just as much as you are your own person and not just a collection of all the treatments you have received during your life. For example, they may be interested in things that you are not. You may want your child to be good at maths, but they may be more interested in music or literature. You have to know when to lead and when to let your children explore the world for themselves, which can be difficult but rewarding.