It's harder because you can't hear the emotion in their voice as if you were actually speaking to them. Someone over text could say they are fine with 17 million happy face emojis but behind there screen they could be crying. You never know. You can't see them either to read the persons face of emotion.
It’s hard because you cannot hear the tone and emotion of what the person is conveying to you. Often times, messages are taken out of context because of this.