“…for not with you alone am I making this covenant, but both with those who stand here with us today, before our God, and with those who are not here with us today." Deuteronomy 29:14-15
The sages say that God gave Torah to the people in the wilderness because, without the teaching, the world is a wilderness and the people wander aimlessly. And yet, after receiving it, the people wandered.
This is because practicing the way is not nearly as easy as receiving it.