How does one attain asceticism?

It was said to Ibrahim ibn al-Adham: “How did you attain zuhd (asceticism)?”

He said: “With three things, I saw that the grave is lonesome and that I would have no companion therein; I saw that the path is long while I had no provisions; and I saw that the Omnipotent would be the Judge while I had no valid argument (in my defence).”