In reality, another person’s assessment does not suffice in place of one’s own seeing. A woman may be beautiful in one person’s eyes but not in another’s. A person may, for example, see a woman in a state other than her natural one, for at times of happiness and the like a person has one appearance; in times of sadness, another; and in an ordinary state, yet another. Moreover, when a woman knows that he will look at her, she may sometimes enhance her appearance, so that when he sees her he thinks she is very beautiful, when she is not so.
In any case, we say that the apparent import of the sunnah is that looking at the woman one intends to marry is sunnah, because the Prophet, peace and blessings be upon him, instructed it and said: “It is more likely to create affection between you.” (1) That is, to bring the two of you together in mutual affection.
But how is he to look? If it is possible for him to see her with the agreement of her guardian—for example, by coming in and looking at her—then he may do so. If that is not possible, then he may conceal himself in a place through which she passes, or the like, and look at her, based on the Prophet’s saying: “When one of you proposes marriage to a woman, if he is able to see something of her that will encourage him to marry her, then let him do so.” (2)