We begin life in the womb as a helpless fetus. What has this to do with maturity? It is the starting point and the starting point of anything has profound effect on what immediately follows.
A Fetus is a person who is completely dependent on its mother. It lives in a safe and comfortable temperature controlled environment. It is nourished by the mother, continuously and without any effort on its part. Its digestive system and other organs are still in stages of development and at this time unused and unneeded. The fetus doesn’t even need to breath. It does, in the later stages of fetal development, become self aware to some extent and also aware of its mother and possibly some sounds outside its little totally secure world.
It lives, seemingly in comfort, and has no obligations to itself or others of which it is aware. It only has to develop and grow and none of that requires conscious thought and certainly no conscious decisions on its part.
This is the first step in life, our initial experience, our cornerstone of what will soon change dramatically.