"Do not spoil what you have ...."

Do not spoil what you have by desiring what you have not; remember that what you now have was once among the things you only hoped for.

Not what we have, but what we enjoy, constitutes our abundance.

Epicurus

"... from a wild animal ...."

"... from a wild animal ... I might learn something of mindlessness, something of the purity of living in the physical senses and the dignity of living without bias or motive."

"Favour and disgrace ...."

Favour and disgrace would seem equally to be feared; honour and
great calamity, to be regarded as personal conditions (of the same
kind).

What is meant by speaking thus of favour and disgrace? Disgrace is
being in a low position (after the enjoyment of favour). The getting
that (favour) leads to the apprehension (of losing it), and the losing
it leads to the fear of (still greater calamity):--this is what is
meant by saying that favour and disgrace would seem equally to be
feared.

And what is meant by saying that honour and great calamity are to be
(similarly) regarded as personal conditions? What makes me liable to
great calamity is my having the body (which I call myself); if I had
not the body, what great calamity could come to me?

Therefore he who would administer the kingdom, honouring it as he
honours his own person, may be employed to govern it, and he who would
administer it with the love which he bears to his own person may be
entrusted with it.

Tao Te Ching, Chapter 13 (translated by James Legge)