Day Questions

At what point can I consider one adil, so to accept him as a witness or in leading the congregational prayers? Is there a certain amount of time I must spend with him, or is it sufficient to spend a short amount of time but to feel generally sure of his adalah?

There is no specific time for this, but it depends on socializing for a usual period that is sufficient for the manifestation of goodness from him and the absence of ill deeds.

Is it allowed for Muslim women to marry Christian Men?

No, it is not permissible for a Muslim woman to marry a Christian man.

If one recognizes more than one marja to be qualified to follow, why should he follow one marja

He should follow one of them because only one of them has the religious authority for the duty-bound person, even if he may not have initially identified him. The individual should determine this Marja in accordance with the rules of the Sharia, so that he may learn of the Islamic laws pertaining to the issues that he faces in the usual course of his life.