I wanted to talk about speaking the truth at all cost. The thing is that this comes up in Musar.

 speaking the truth  has power. It is  the one thing that can save a person from all is enemies and troubles.

This should be taken with keeping in mind that many people do not speak the truth. Or they leave out things that change the significance. If you do commit yourself to speaking the truth you still need to be careful to stay away from liars.

is when a person is surrounded by darkness the way out towards the light is by holding to the trait of speaking the truth at all cost. In ch. 66 he refers to speaking the truth as a way of being saved from evil people.