All sins begin with an impure heart. The mind receives the thought first, making entertaining sinful thoughts the most common sin. Left unchecked, the sin propels the sinner into action, and the easy action to take is to speak words. Hence, sinning in words is the next most common sin, often causing others to sin in their thoughts and words. The other action is to perform the deed to fulfill the sinful intention. This sin may be the least common of the three here, but it can affect others devastatingly.