Is it permissible for a woman to uncover her face in order to seek knowledge?
Question

                I heard on TV one day that it is permissible for girls or women to uncover their faces in order to seek knowledge. I do not remember which madhhab that was, but the speaker said that the Messenger (peace and blessings of Allaah be upon him) said: “The difference of opinion among the fuqaha’ of my ummah is a mercy.” 

Especially since I am finding it difficult to move from being unveiled to wearing hijab and jilbaab. Please tell me what is right so that I can follow it.
Praise be to Allah.
      Firstly: 

    The hadeeth “The difference of opinion among the fuqaha’ of 
    my ummah is a mercy” is a fabricated hadeeth, as it says in Asraar 
    al-Marfoo’ah, 506 and Tanzeeh al-Sharee’ah, 2/402. 

    Shaykh al-Albaani said of this hadeeth in al-Silsilah 
    al-Da’eefah wa’l-Mawdoo’ah (hadeeth no. 57): It has no basis, and the 
    muhaddithoon (scholars of hadeeth) tried hard to find an isnaad for it but 
    without success. 

    Al-Manaawi narrated that al-Subki said: It is not known to 
    the muhaddithoon, and I could not find any isnaad for it, whether saheeh, 
    da’eef or mawdoo’. This was confirmed by Zakariya al-Ansaari in his 
    commentary on Tafseer al-Baydaawi. 

    End quote 
It is not permissible for 
    a woman to uncover her face in front of non-mahram men, except in cases of 
    necessity, such as a medical doctor when no female doctor is available, so 
    long as she is not alone with him (khulwah), or when proposing marriage, or 
    when bearing witness in front of a qaadi (judge). In the cases mentioned 
    above, it should be limited only to that which is necessary, and no more 
    than that. 

    A woman’s hijab and niqab do not pose an obstacle to her 
    seeking knowledge. It is not correct to believe that there is a 
    contradiction between covering and seeking knowledge. May Allaah never bless 
    knowledge that is only acquired by means of sin and women neglecting 
    modesty. Women who wear hijab and are covered have reached the highest 
    levels of knowledge and have earned degrees and certificates without mixing 
    with men or uncovering their faces, whilst we see many of those who fail to 
    acquire knowledge wearing the minimum of clothing on their bodies. Since 
    when does neglecting modesty bring knowledge and hijab prevent it? 

    Covering the face is obligatory for Muslim women who have 
    reached the age of adolescence. In the answer to question no.
    12525 you will find an explanation 
    that the face is ‘awrah. 

    We have discussed the evidence that it is obligatory to cover 
    the face in the answer to question no. 
    21134, 21536 and
    11774. 

    The view that it is permissible for women to uncover their 
    faces in order to seek knowledge is not correct. 

    We ask Allaah to help you to do that which pleases Him, and 
    to reward you greatly for your question and your efforts to learn. Our 
    advice to you is to keep away from dubious places where mixing takes place. 
    We give you the glad tidings from the Prophet  (peace and blessings of 
    Allaah be upon him) who said: “Whoever gives up a thing for the sake of 
    Allaah, Allaah will compensate him with something better than it.” So seek 
    the help of Allaah and be patient. The first Muslim women gave up their 
    (former) religion, their husbands and their homelands in order to enter 
    Islam, and this move from being uncovered to wearing hijab is insignificant 
    in comparison to what those women did. Be sure that you will find 
    encouragement from your veiled sisters who will make that transition easier 
    for you. Do not pay any attention to the obstacles put in your way by evil 
    and corrupt people, women and men alike, for they do not wish you well and 
    they do not want you to be happy or be rewarded, nor do they know the true 
    path to happiness and reward. 

    And Allaah knows best.