The story takes two breaths. Hillel the Elder was returning from a journey and walking the final miles toward his home in Jerusalem. As he approached the city, he heard loud noise — shouting, clamor — rising from the direction of the neighborhood where he lived.
A lesser man would have started running. Hillel did not quicken his pace. He said simply, I am certain this is not coming from my house.
Berakhot 60a preserves the teaching behind his confidence. Hillel's home was a place of such consistent peace, such steady Torah, that the sounds of panic and quarrel were structurally foreign to it. The screaming outside had to belong to some other family.
The line is not arrogance. It is the natural serenity of a man who has organized his home around the verse in Psalms 112:7, He will not be afraid of evil tidings; his heart is steadfast, trusting in the Lord. Gaster's Exempla (No. 290, 1924) preserves the fragment as a meditation on what it would feel like to come home and already know — because of how you have built your house — that the noise cannot possibly be yours.