Answer:
The quote from Dr. Zhivago shows that Chris’s goal and aspiration is to achieve true happiness, which he realized he could only achieve if he dedicates his life to helping and improving the lives of others.
Explanation:
Chris McCandles believed he could discover true happiness alone in the wild, but the quote from Dr. Zhivago, “And so it turns out that only a life similar to the life of those around us, merging with it without a ripple, is genuine life, and that an unshared happiness is not happiness…and this was most vexing of all.”, made him realized that he could never be truly happy alone.
He wrote “Happiness only real when shared” in the margin next to the quote, which tells us exactly what his goal is all along, and so he decided to go back and dedicate his life to helping others so that he could achieve that true happiness.