Answer:
Discontent and dissatisfaction are synonyms, generally implying a strong desire for something more, something bigger or something better, to get more of what's been tested or anticipated; in this case,
the "wonderful discoveries of modern philosophers" turned out to be just an appetizer for the narrator, who remained longing for more knowledge.
Ergo the suitable line is: "I always came from my studies discontented and unsatisfied"
Step-by-step explanation: