Final answer:
Walter feels a deep sense of unrest and injustice due to being deprived of the full reward for his labor, seeing his master's actions as thievery and feeling coerced into obedience and thoughtlessness about his future.
Step-by-step explanation:
Walter expresses his discontent with his job and future as a feeling of restlessness and injustice. He is frustrated by the lack of reward for his hard work and sees the minimal portion of his earnings he is given as an acknowledgment of his entitled right to all of his wages.
Walter views his master's demand for the entirety of his wages with 'robber-like fierceness' as both exploitative and demoralizing, leading him to constantly seek means of escape from his enslavement.
Despite being advised to not think of the future and to be obedient, Walter cannot help but continue to seek justice and contemplate escape, feeling that his intellectual nature cannot be content in slavery.