No doubt much evil is wrought by want of thought. Many people with kindly heart continually cause pain to others by mere heedlessness. They seem to have no perception of the sensibilities of those about them. They have never trained themselves to think at all of others in connection with their own words or acts. They have accustomed themselves to think only of their own pleasure, and to say and do only what their own impulses prompt, without asking whether others will be pleased or displeased. They think only of their own comfort and convenience, and never of how the thing they wish to do may break into the comfort or convenience of others.