Like all borders and boundaries, fences serve dual purposes: they keep the bad out and keep the good in. Despite the political shadow cast over this model of selective permeability, the abstract value of boundaries should not be lost on us.
In Pirkei Avot, Rabbi Akiva suggets, "Tradition is a fence to the Torah; Tithes a fence to wealth, Vows a fence to abstinence; A fence to wisdom is silence." (Pirkei Avot 3:13).
Making a fence around our own words means knowing all the good within us, and making sure it's kept from perversion. When we lose our sense of boundaries, we risk slipping into impious habits.
Reflection:
How do we learn from mistakes and grow if we hide behind fences?
Lived practice:
Try this: Write "Are you sure?" on a post it and place it on your laptop. Does this cautionary 'fence' help you better monitor (pun intended?) your thoughts and behaviors?