Always turning to Allah (GOD), placing one’s trust in Him, and being satisfied with His care and protection these are among the most important of factors that bring happiness to the believer.
Allah: the Great and Glorious name. Going back to the root of the word, we learn a special meaning. Some say that the name Allah comes from the root A-La-Ha. This means the one whom the hearts of people love, find peace in, are happy with, turn to, and accept as their God. Also, it is impossible for the heart to find peace or comfort with other than Him.