Hillel says, "If I am not for myself, who will be for me? But if I am only for myself, who am I? If not now, when?" – Avot 1:14

“He who has not yet ruled over his evil inclination is like one lost along the paths [of the maze] unable to differentiate between them.” – The Path of the Just, Rabbi Moshe Chaim Luzzatto

“Commit your way to Hashem, rely on Him and He will act. He will bring forth your righteousness like a light, and your justice like the high noon.” – Psalms 37:5-6

“Align the course of your feet, and [thereby] all your ways will be corrected.” – Proverbs 4:26

“Generally, one must be content to rely on logic and make his determination based on probability. Moreover, one must reach his logical decisions quickly, for most situations require alacrity so that the opportune moment does not pass.” – Rabbi M.M. Lefin of Satanov, Cheshbon HaNefesh