Free will and Divine providence are deeply intertwined in the biblical concept of reward and punishment. Rather than presenting a future prize for good behavior, the dynamic of blessing is inherently linked to the action itself. The primary approach among commentators is that a blessing is not merely an external reward granted in exchange for a good deed; rather, the very performance of a Commandment is the blessing. Obeying God elevates a person morally and spiritually. This is comparable to a patient following a doctor's orders, where good health is simply the natural result of those actions [אבן עזרא, מלבי״ם, רש״ר הירש]. This spiritual elevation includes the profound joy and pleasure experienced through studying Torah, which acts as an elixir of life. While the principal reward for obedience is reserved for the World to Come, a person is still able to enjoy the immediate fruits of this blessing in the present world [אור החיים].
Because the Israelites heard the first two Commandments directly from God, they might have assumed that only those specific directives yield an immediate reward, much like an employer who is obligated to pay a laborer at the end of the day. To counter this, Moses emphasizes that the Commandments he personally transmits also carry immediate worldly blessings [אדרת אליהו לרבי יוסף חיים, חומת אנך]. This transmission includes his role in explaining and clarifying the Oral Torah [הכתב והקבלה]. Furthermore, the responsibility to observe these laws is not a stagnant historical event; it is continuously renewed. A person must view the obligations of the Torah as if they were given brand new every single day [רש״ר הירש].
A profound distinction is drawn between the promise of a blessing and the warning of a curse. The blessing is presented with language of absolute certainty, whereas the curse is framed merely as a conditional possibility. Many commentators view this contrast as a reflection of God's deep love for Israel. God operates under the assumption that the people are fundamentally righteous and will undoubtedly choose the good path, thereby addressing them with absolute certainty. Conversely, He frames the curse with doubt due to a reluctance to bring disaster upon them [כלי יקר, אור החיים, רבנו בחיי, תולדות יצחק, ברכת אשר]. Another perspective suggests that the language of certainty surrounding the blessing simply establishes an absolute, undeniable obligation to obey Him [אדרת אליהו].
Other scholars understand this distinction as a matter of timing and condition [רש״י, מזרחי, משכיל לדוד]. God grants the blessing immediately, even before the good deed is fully executed, in order to encourage the person to listen in the future. By providing this preemptive blessing, God helps the individual succeed by removing obstacles and allowing their good intentions to materialize. The curse, however, is strictly conditional and only takes effect after a person actually deviates from the proper path. This difference stems from the principle that God combines a good thought with a good deed, allowing the blessing to take root the moment a person resolves to obey. A negative thought, however, is not counted until the sin is actually committed [כלי יקר, גור אריה, חתם סופר, העמק דבר, מלבי״ם].
To illustrate the fundamental choice between these two realities, commentators offer a metaphor of an old man sitting at a crossroads, warning travelers about the routes ahead. One path begins with tangled thorns and requires great effort, but it eventually opens up into a smooth and comfortable journey. The second path starts out flat and easy to walk, but its end is blocked by impenetrable thorns. The path of blessing and Commandments demands physical effort and dedication in this world, but it ultimately leads to peace and joy in eternal life. In contrast, the path of transgression may appear easy and inviting at first, but it inevitably leads to the thorns of destruction and despair [רא״ש, דעת זקנים].