My therapist lied to me once. I was really angry about it when he confessed, but it didn't take me too long to understand why he did that. I was ok with it after he explained why he did that.

Like others said, therapists have qualities just like everyone else, and lying is something that every human being has done. In my point of view, being defensive when caught in a lie, like trying to say how it wasn't really a lie, shows deception, while admitting it and taking responsibility for it, shows integrity.

Honesty is really important to me as well, but lying from time to time is inevitable, I believe. It can be used for protection or because of fear, and other reasons for either the person who lied or for the person being lied to.