Wisdom herself speaks directly to humanity, declaring that she is the ultimate source of a long life [אבן עזרא]. Wisdom and the Torah are presented as a wellspring of profound power and vitality, possessing a unique ability to grant life and even overcome the natural limits of the world [ביאור שטיינזלץ, אלשיך]. By engaging deeply with the specific details of wisdom and moral teachings, a person is promised a significant extension of their days [אבן עזרא].
This multiplication of time happens in several distinct ways. On a mental level, the Torah offers a person a sense of deep peace and rest from the daily anxieties of the world. Because these days are free from stress, a normal lifespan feels rich, quiet, and effectively doubled [חומת אנך]. Beyond just a feeling, this extension can be entirely physical. The power of the Torah can actually cancel heavenly decrees and bypass the laws of nature, granting a long life even to someone who was originally destined to die at a young age [אלשיך].
The primary approach among commentators is that this promise is not merely about adding biological time, but about vastly improving the quality of life. These added years are filled with livelihood and wealth [רש״י]. They are characterized by goodness and joy rather than sorrow, because years spent in suffering cannot truly be called living [אלשיך, מלבי״ם]. Another perspective suggests that even if a person cannot be granted completely new years beyond the standard human lifespan, they can still receive additional time. These extra years are gathered from the unused time of people who sinned and died prematurely, and are instead awarded to the one who studies the Torah [חומת אנך].
Furthermore, this addition of time is not limited to physical existence in this world. Having more days gives a person the valuable opportunity to perform more good deeds and gather merits. Through this process, the Torah ultimately grants a person eternal, spiritual years of life in the World to Come [אלשיך, מצודת דוד, אמרי דעת].