דברים, פרק ח׳, פסוק י״ח

It is human nature to claim credit for personal success, attributing achievements to one's own skills and hard work. When a person accumulates wealth and prospers, a subtle danger arises: the tendency to forget the true source of these blessings. The Israelites, possessing natural bravery and military might, were especially vulnerable to believing their victories were the direct result of their own physical power [רמב״ן, הטור הארוך]. Some people mistakenly credit their accomplishments entirely to nature [אבי עזר]. Others adopt the view that God merely provided them with initial energy at the moment of their creation, leaving them to function and gather wealth completely independently from that point onward [העמק דבר].

In response to these misconceptions, the primary approach among commentators is that the purpose of these warnings is to awaken a constant awareness of God’s active providence. The concept of strength extends far beyond mere physical muscle. It encompasses intelligence, mental and physical health, and even the arrangement of external circumstances that make success possible [רש ר הירש]. Furthermore, this strength includes the wisdom and understanding required to accumulate wealth honestly, rather than through theft or corruption [אוהב גר, נתינה לגר]. The internal energy that allows a person simply to move their limbs and take action is continuously channeled to them from above at every single moment [מלבי״ם]. Even if a person believes their financial success is a combination of personal effort and astrological fate, they must recognize that God is the supreme ruler over all these forces. While human livelihood might appear subject to destiny, without God actively sustaining the cosmos, those forces hold no real power; it is ultimately He who decrees both wealth and poverty [רבנו בחיי].

Maintaining a constant awareness of the source of success serves as a crucial spiritual boundary. The evil inclination actively works to make a person forget their dependence on God. This forgetfulness creates a slippery slope, ultimately leading to the abandonment of God and outright idol worship [אור החיים]. To combat this spiritual amnesia, a person must look to history. They are called to remember their complete helplessness in Egypt and the miracles that sustained them in the wilderness, where they had no natural means of survival. They must also recognize that their triumph over the mighty Canaanite nations, with their fortified cities and formidable giants, was not achieved through human might, but solely because God fought on their behalf [רמב״ן, הטור הארוך].

Ultimately, success and prosperity are not granted as a reward for personal righteousness or moral superiority. Everything is provided to uphold the covenant and the oath that God swore to the forefathers of the nation [רש ר הירש]. Just as the people can clearly see the fulfillment of this ancient promise in their present reality, they must understand that they lack independent merit; their current prosperity stems entirely from that historical oath [הכתב והקבלה, אדרת אליהו, ביאור שטיינזלץ]. Grounded in this profound recognition, a person is required to keep God's commandments, ensuring that His kindness and the strength He provides will continue to accompany them always [מלבי״ם].