Your True Self

Dear Professor Snape,

I have so many questions regarding you not showing your true self however I will start with this one, how did you trick The Dark Lord with him being an accomplished Legilimens? Would he not be able to tell if someone was using Occlumency?

Ingenious Ravenclaw

Dear Ravenclaw,

Every wizard has his specified talents, areas in which one excels, usually due to the detriment of another skill or attribute. I am exceedingly good at Occlumency, as I have dedicated the majority of my life to it, as well as potions and defense. I lived my life devoid of emotion so that when the time came I would be well prepared. I maintained his trust until the very end.

Prof. Snape.