By the age of 20, one is considered fully equipped to cope with temptation.
The Collateral Tabernacle Being guilty of idolatry is equal to violating all the commandments of the Torah. Translated and annotated by Rahmiel-Hayyim Drizin from PaRDeS HaBahir
The Real Count From the Ohr HaChaim commentary by Rabbi Chaim (ben Moshe) Ibn Atar
Items which have been "counted" usually do not enjoy lasting blessing.
The Remedy Before the Cure All that is gold does not glitter. Translated and annotated by Rahmiel-Hayyim Drizin from PaRDeS HaBahir