Prayer may be done privately and individually, or it may be done corporately in the presence of fellow believers. Prayer can be incorporated into a daily "thought life", in which one is in constant communication with a god. Some people pray throughout all that is happening during the day and seek guidance as the day progresses. This is actually regarded as a requirement in several Christian denominations, although enforcement is not possible nor desirable. There can be many different answers to prayer, just as there are many ways to interpret an answer to a question, if there in fact comes an answer. Some may experience audible, physical, or mental epiphanies. If indeed an answer comes, the time and place it comes is considered random.