There are rewards in the spirit and rewards are better than answers, and if you are a hypocrite, you are excluded from the opportunity of getting rewards.
You might be in the public place, but you are not caught up in the public place because you are in the closet.
Your true altar is not your mouth or anything other thing, your true altar is your heart and God sees through your heart.
Anything that will compromise your heart, will compromise your possibilities in the place of prayer, and you can never deceive God because he knows you more than you know yourself, because he sees you through your heart.