Likutei Moharan 60:2/ליקוטי מוהר"ן ס׳:ב׳

12. The way to attain this wealth is by means of the rectifications of Atik, the aspect of length-of-days, the aspect of an elder. For a person needs length-of-days in order to receive in them the wealth of contemplation.

2Length-of-days is that a person must attempt to extend and increase his days, because the place where each day starts for each person is certainly narrow at first. In other words, at the beginning of the day, the devotions that he must perform on that day—e. g., praying, studying [Torah], and the like—are extremely difficult for him. Due to this, the day’s beginning is narrow, since he must begin little by little and then afterwards expand and progress in his devotions.

3Thus a person must attempt to increase, expand and extend each successive hour; increasing and expanding it with increased holiness. Likewise, when the next day arrives, it should progress and expand with even more increased holiness. And so too each time, his days should expand with increased holiness. This is the aspect of length-of-days.

4Hence Avraham, who merited the aspect of an elder/length-of-days, as a result merited wealth, the aspect of “Avraham was elderly, well advanced in years, and God had blessed Avraham with everything” (Genesis 24:1). This is likewise the aspect of “I gained understanding from the elders” (Psalms 119:100)—by means of the aforementioned aspect of an elder one achieves contemplation, which stems from the wealth infused into length-of-days, which is the aspect of an elder, as explained above.