The Ego And His Own - pg. 13

Not till one has fallen in love with his corporeal self,
and takes a pleasure in himself as a living flesh-and-blood person -
but it is in mature years, in the man, that we find it so - not till
then has one a personal or egoistic interest, an interest
not only of our spirit, for instance, but of total satisfaction, satisfaction
of the whole chap, a selfish interest. Just compare a
man with a youth, and see if he will not appear to you harder,
less magnanimous, more selfish. Is he therefore worse? No,
you can say; he has only become more definite, or, as you also
call it, more "practical". But the main point is this, that he
makes himself more the centre than does the youth,
who is infatuated about other things, for example, God, fatherland,
and so on.