Final answer:
The quote is most likely from Laozi, the founder of Daoism, as it reflects the Daoist principles of living in harmony with the natural way of things and advising the practice of 'wu wei' by letting life flow naturally.
Step-by-step explanation:
The quote in question is attributed to Laozi, the founder of Daoism. Life being a series of natural and spontaneous changes aligns with Daoist principles that emphasize living in harmony with the natural way of things. The philosophy of Daoism teaches acceptance and advises us to let go of resistance to maintain inner peace and harmony.
Daoism, as a philosophy, is known for advocating a lifestyle that is in sync with 'the Way' or dao, and emphasizes simplicity, harmony, and the natural flow of life. The concept mentioned in the quote reflects the Daoist notion of wu wei, which involves taking no unnatural action and allowing life to unfold spontaneously. This approach is seen as a path to serenity and a means to avoid unnecessary sorrow.
Legalism, Confucianism, and the teachings of Abraham have fundamentally different orientations towards life and society and would not espouse such a view of life as the quote suggests. Therefore, the most appropriate answer is Laozi, founder of Daoism (option b).