The amount of energy a client puts into growth and change will set the pace of how successful his or her time in therapy will be.
It is not a good idea to start therapy one week and then stop just because you may have seen small quick and positive results. The positive results won't necessarily be maintained until your period of planned therapy treatment is over.
At that point you can review where you are and decide if more therapy is required or, if you are ready to face the world without continuing therapy. The point is - it has to be planned.
Therapy is a process that are to be maintained especially considering intensity of the presenting problem. Learning the nature of presenting issues and an appreciation of the benefits of therapy normally takes more than one or two sessions.