Musar and good behavior cannot be rendered durable without extensive stratagems, to bind the instruments of the mind thereto, until a strong impression is made upon the heart, whereupon the outer limbs are suffused with strength and bring forth into actuality the exalted goal: lowly physical lusts- shameful vainglory and jealousy- can no longer restrain one [in this strategic effort].- Rav Yisrael Lipkin (Salanter) from Letter One in Ohr Yisrael

Translated and cited on page 31 of Israel Salanter: Text, Structure, Idea by R Hillel Goldberg