Therefore the proverb-tellers say: Come to Cheshbon; let the city of Sichon be built and established.
Torah Temimah: Bava Basra 78b
English: It was taught: R. Shmuel bar Nachmani said in the name of R. Yonasan: what is meant by “therefore the proverb-tellers say, Come to Cheshbon”? The “rulers” are those who rule their inclination; “come to Cheshbon” — come and calculate the account of the world.
Allegorical reading of moshelim / Cheshbon.
One who masters his yetzer should weigh the loss of a mitzvah against its reward and the reward of a sin against its loss.