TT #42 · Parashas Noach · Third Aliyah · Passuk 8:21
…for the inclination of man’s heart is evil from his youth…
Torah Temimah points to Kiddushin 30b.
E-Daf image — Kiddushin 30b (size=3)
English: “For the inclination… is evil” — The Sages taught: How difficult is the yetzer hara, that even its Creator called it evil!
Custom (emphasis on the severity of the yetzer from the divine naming).
The yetzer is so formidable that even its own Creator designates it as evil.