The quote indicates a desire to break devoid of conventionality and embrace a more primal, instinctual lifestyle. Wild animals, unlike humans, do not have social standards, expectations, or limitations on their behavior. Rather, they act on impulses and instincts, responding to their environment and requires in the moment.
By desiring be "spontaneous like a wild animal," the speaker may be suggesting a desire to release themselves from the restraints of social norms and expectations. They may seek a more genuine or instinctive way of living that is unencumbered by the expectations of others.
The quote likewise highlights the speaker's desire for flexibility and a sense of lightheartedness. Wild animals are frequently associated with freedom, as they are not bound by human-made structures or constraints. For that reason, the speaker may want to live life with a sense of liberty, unencumbered by the weight of responsibilities, expectations, and societal norms.
In short, the quote suggests a yearning for a more natural, genuine, and spontaneous lifestyle, devoid of the conventions of society.
"Often and often afterwards, the beloved Aunt would ask me why I had never told anyone how I was being treated. Children tell little more than animals, for what comes to them they accept as eternally established"
"Certainly it is wrong to be cruel to animals and the destruction of a whole species can be a great evil. The capacity for feelings of pleasure and pain and for the form of life of which animals are capable clearly impose duties of compassion and humanity in their case"
"Art owes its origin to Nature herself... this beautiful creation, the world, supplied the first model, while the original teacher was that divine intelligence which has not only made us superior to the other animals, but like God Himself, if I may venture to say it"