Avraham's three traits lead to love of Hashem

איתא במשנה מי שיש בו ג' דברים אלו עין טובה רוח נמוכה נפש שפילה מתלמידיו של אאע"ה.

It is taught in the Mishnah (Avos 5:19): Whoever possesses these three traits — a good eye, a humble spirit, and a lowly soul — is among the disciples of Avraham Avinu.

The Sefas Emes opens with the Mishnah listing the three character traits that mark a person as a talmid of Avraham.

דמאחר דכתיב אשר יצוה כו' ושמרו א"כ הוא מלמד לנו איך לעבוד את הקב"ה וע"י ג' מדות הנ"ל זוכין לאהוב את ה' שהיא מדתו של אאע"ה כדמייתי קרא להנחיל אוהבי יש.

For since it is written, "that he will command [his children]... and they shall keep [the way of Hashem]" (Bereishis 18:19), it follows that he teaches us how to serve Hashem; and through the three traits mentioned above one merits to love Hashem, which is the midah of Avraham Avinu, as the Mishnah brings the pasuk "to bequeath substance (yesh) to those who love Me" (Mishlei 8:21).

Because Avraham was charged to teach his children Hashem's way, the three traits are the path he transmits; they lead to ahavas Hashem, Avraham's defining attribute of love.

שע"י ג' מדות הנ"ל שהם במחשבה דיבור ומעשה זוכין אל אהבת הבורא וכתיב בפרשת ק"ש ואהבת את ה' כו' אשר אנכי מצוך היום.

For through the three traits mentioned, which are in [the realms of] machshavah, dibbur, and ma'aseh (thought, speech, and action), one merits the love of the Creator; and it is written in the portion of Krias Shema, "And you shall love Hashem... which I command you today" (Devarim 6:5-6).

The three traits operate in thought, speech, and deed, and together bring one to love of Hashem — the very love commanded in Shema "today," every day.

וציווי זו בכל יום הוא ע"י אברהם אבינו דכתיב בי' אשר יצוה את בניו:

And this daily commandment [to love Hashem] comes through Avraham Avinu, of whom it is written, "that he will command his children."

The ongoing, daily charge to love Hashem is itself the legacy of Avraham, who was designated to command his children in Hashem's way.

Summary: The Mishnah's three traits of a disciple of Avraham — a good eye, a humble spirit, and a lowly soul — operate in thought, speech, and deed, and together bring a person to ahavas Hashem, Avraham's defining midah. Because Avraham was charged "to command his children" in Hashem's way, the daily mitzvah of "And you shall love Hashem... which I command you today" is his enduring legacy.