Full Idea
A multiplicity of forces, conjoined through a common nutritive process, is what we call 'life'. All so-called feeling, representing, thinking is part of this nutritive process to enable resistance to other forces, and arrangement, and an evaluation.
Gist of Idea
Life is forces conjoined by nutrition, to produce resistance, arrangement and value
Source
Friedrich Nietzsche (Unpublished Notebooks 1882-84 [1883], 24[14])
Book Reference
Nietzsche,Friedrich: 'Fragments from the period of 'Zarathustra' (v 14)', ed/tr. Loeb/Tinsley [Stanford 2019], p.590
A Reaction
[compressed at the end] Since no one else seems able to define life, this is quite a good attempt. Life is certainly a sort of unification of active energies, which than share goals.