Full Idea
One loves from the very heart only one's child and one's work.
Gist of Idea
We only really love children and work
Source
Friedrich Nietzsche (Thus Spake Zarathustra [1884], 3.03)
Book Reference
Nietzsche,Friedrich: 'Thus Spake Zarathustra', ed/tr. Hollingdale,R.J. [Penguin 1969], p.181