A person's inner world of fears and hopes often serves as a mirror reflecting their future. A deep divide exists between the mindset of those who do wrong, who live in constant anxiety, and the peace of mind enjoyed by those who walk a straight path. This contrast does not remain only in the mind; it ultimately shapes the reality of their lives.
A profound sense of dread and terror accompanies anyone who acts with cruelty and violence. Driven by an inner awareness of their own guilt, those who do wrong live in a constant state of panic, as if always hiding from a perceived threat [מצודת ציון, מלבי״ם]. They are terrified of either God's punishment or the revenge of the people they have hurt [עמנואל הרומי, אמרי דעת]. This persistent fear is a direct result of living without God's protective guidance [רלב״ג]. No matter how many schemes they invent to escape the very thing they are afraid of, their fate will eventually catch up to them and their worst fears will become reality [מלבי״ם]. Historical examples illustrate this pattern: the generation of the dispersion feared being scattered across the earth, which is exactly what God did to them [רש״י], and the generation of the Flood was ultimately punished for their actions [אלשיך].
On the other hand, the reality for good people is completely reversed. Because they know they have not acted against the Creator's will, they live with hope rather than fear [אמרי דעת]. Their primary desires are to be close to God and to attain wisdom [עמנואל הרומי]. God is the only one who has the power to fulfill these wishes [רש״י, אבן עזרא, מצודת דוד]. While those who do wrong exhaust themselves trying to escape their fate only to fail, the righteous do not even need to struggle to achieve their goals. God simply grants them their heart's desires through His personal care and attention [מלבי״ם]. A different perspective suggests that the specific desire of the righteous in this context is actually the wish to see the downfall of the wicked [אבן עזרא].
However, this rule of exact justice—where the guilty are punished with their fears and the good are rewarded with their hopes—is not always immediately obvious in everyday life. Often, it requires patience and time to see these promises fully become reality [ביאור שטיינזלץ].