Far more unwaveringly, the neurotic keeps before his eye his God, his idol, his ideal of personality and clings to his guiding principle, losing sight in the meanwhile of reality, whereas the normal person is always ready to dispense with this crutch, this aid, and reckon unhampered with reality.
Alfred AdlerEach generation has its few great mathematicians, and mathematics would not even notice the absence of the others. They are useful as teachers, and their research harms no one, but it is of no importance at all. A mathematician is great or he is nothing.
Alfred Adler