Each scent emits a different type of mood such as happy or relaxing. For example, lavender is usually associated with relaxation while lemon is often found in kitchens to make the room smell clean and fresh.
 
Reminiscence Therapy
Certain smells can bring up memories from the past. For example, some people may remember their grandmother’s baking when they smell vanilla or certain spices. 
 
Spiritual Therapy
Each scent can bring up different memories for different people. Some may associate the smell of incense with the church, while others may think of their home country when they are far away from it.  Different smells and how we interpret them are what make candles therapeutic in this way!