It is also a natural thing for a serious young man that he should form for himself as precise an idea as possible of the goal of his desires.
Albert EinsteinMy deep religiosity [...] found an abrupt ending at the age of twelve, through the reading of popular scientific books.
Albert EinsteinIt is true that my parents were worried because I began to speak fairly late, so that they even consulted a doctor. I can't say how old I was - but surely not less than three.
Albert Einstein