Nobody is expected to be perfect, but everyone is expected to be honest.
blessing and curse
The Jews are about to complete their forty year journey and enter the Land of Israel! G-d is now giving them a choice: they can choose blessings by listening to the Torah, or can choose a cursed life if they do not obey His commandments. When G-d offers them this choice, He uses the word 'today,' indicating that it is a decision that applies to every Jew every single day. Which do you choose?