Your name of Tisa has formed an independent, positive, and determined personality. It is difficult for you to visualize or theorize unless the ideas being presented are developed in a logical step-by-step manner. As you are not overly conversational, at times you consider time wasted when spent in idle chatter. Your lack of expression can lead to misunderstandings and unhappiness with those close to you who do not understand your practical, candid, somewhat self-centred approach. You are serious and methodical. You are more interested in being active and accomplishing the tasks you set for yourself. Although you are not naturally spontaneous in musical or artistic expression, you can develop technical proficiency along these lines. It is what you can see, experience, and prove through compilation of facts, experiment, and logic that has greatest value to you. You work best alone, making your own decisions, and learning from your own experiences. Health weaknesses centre in the head, resulting in such conditions as headaches, sinus problems, weak eyes, or impaired hearing.