In The Name of Allaah, The Most Merciful, The Bestower of Mercy
Shaikh Uthaymeen [rahimahullaah] stated above that one should firmly cling to the book he is reading or revising, and should firmly cling to the Shuyookh he learns from in person. Do not be a Dhawwaaq [i.e. one who quickly acquires a taste of this or that and moves on to another thing without accomplishing anything properly]- alternating to a new Shaikh every week and every month; rather determine -first and foremost- who to take knowledge from in person, then firmly cling to him after you have decided. However, you can have different Shaikhs from whom you acquire different subject matters, for example you have a Shaikh who teaches you Fiqh and you carry on being consistent in your studies; another Shaikh who teaches you Arabic Grammar and you carry on being consistent in your studies; a Shaikh in Aqeedah and you carry on being consistent in studying Aqeedah and Tawheed. The most important thing is consistency and that you refrain from quickly acquiring a taste of this or that topic without accomplishing anything properly- like that man who is a serial divorcee, for whenever he gets married and stays with the wife for seven days, he divorces her and then moves on to another woman. So, he remains for a prolonged period in his life whilst neither enjoying [a fruitful, close, intimate relationship etc] with a wife nor having children in most cases.
[Paraphrased. Sharh Hilyati Taalibil Ilm’ page 75]