What are the Virtues of the Day of Arafaah?

What is the difference in meaning between Allah's names al-Rahman and al-Rahim?
 

What is the rulling on, when a Muslim say "We believe we are all children of Allah" Basing it on the weak Hadeeth (All creations are sustained by Allah). Please provide details of the ruling.

I am a South African who used to study in the United States. When I was studying, I borrowed $6000 US from another South African. We are both back in South Africa now, and it is more convenient for both of us if I pay him back I South African rands. Is this allowed?
 

I am curious about the coverings that you have to wear if you’re a female in your religion/culture. it really does all seem very vain for us that are Christian because it implies that a woman thinks every man wants her if she is not wearing this type of garb. It also seems that men are not to be trusted with someone from your culture/religion because of your "beauty" that you feel you possess, but people could be beautiful and not every man wants them. Can you shed some light on this for me? I will be honest and say that when I see someone wearing this, I always think "how vain are you?". Thank you ahead of time for replying.

What are the things that a Muslim woman may uncover in front of a kaafir woman, such as a Buddhist woman for example? Is it true that she is not allowed to uncover her face?

What is the importance of being truthful, both in personal and business relationships, in Islam? Is lying ever considered and (acceptable) action?

For how long does Allah forgive a person's sin? If he repents and seeks forgiveness from his sin, then goes and commits the same sin again, then he seeks forgiveness again then commits the same sin again, and so on, does Allah forgive him or does that mean that he is not sincere towards Allah, especially if he repeats that sin after a short while, but he does not stop seeking forgiveness?

If the sin involves the rights of another person then what form should repentance take?

Allah tells us in the Qur'an not to cut off our blood relations. What is the interpretation of the Ayah that commands us not to severe ties of kinship? Who does it refer to? Just parents and siblings? What if one maintains contact with one's parents only through telephone or letters although he is capable of visiting them. Yet, he feels that maintaining a certain distance is healthier to the relationship ?

When I do Salah (formal prayers) or intend to do good deeds I often get very evil thoughts in my mind. When I concentrate in Salah, and try to focus on the meaning of the words, evil thoughts enter my mind, which make evil suggestions about everything including Allah. I feel very frustrated and angry about this. I know that none forgives sins except Allah alone, but because of my thoughts I feel that there is nothing worse than to have evil thoughts about Allah. After Salah I ask Allah's forgiveness, but feel very bad because I want to stop these evil thoughts, but I can't stop them. These thoughts spoil my enjoyment of Salah, and also make me feel as though I am doomed. Please advise me.

Is it permissible for me to say to non-Muslims "And the same to you" when they wish me a Happy New Year or say Best Wishes?