The most important reason anyone is an atheist

[Lemonvariable72]

I do not extract my knowledge from the bible like Sword of Christ however your comment does not make any sense.
If we are finite as you say then all the knowledge and consciousness that we got goes to the dogs once we die and by the way where this knowledge and consciousness come from?
Who build it up?
Oh, somebody else build it up for us?
How ridiculous you are!!!
Since when we get something for free?
Didn't you go from primary to high school and from here to some trade or uni and from here to work experience and from here to some work and from here you realize that the hard work continue on and on?
Are you joking?
Physically speaking nothing get lost so why this rule should not apply to something a lot higher like consciousness?
Where is the evidence that we are finite?

Actually enrico that is a question, but here is some evidence that our mind (consciousness) is directly dependant on the brain

In neuroscience, the Montreal procedure is a surgical procedure pioneered by Dr. Wilder Penfield of Montreal, Canada, in the 1930s at the Montreal Neurological Institute of McGill University. It is effective in the treatment of epilepsy.

Dr. Penfield and Dr. Herbert Jasper together developed the "Montreal procedure" as a new neurological approach to eliminating epileptic seizures. The surgeon administers a local anaesthetic to the patient so he or she remains conscious during surgery. The surgeon then removes a piece of skull to expose the brain tissue. In response to probing, the conscious patient can describe his or her feelings so the surgeon can identify the exact location of seizure activity. Dr. Penfield discovered that the removal of the brain tissue in this location contributes to ending the epileptic patient's seizures.

More than half of the patients treated with this new method, which became known as the "Montreal Procedure," were cured of seizures. Dr. Penfield himself performed the operation more than any other neurosurgeon in the world.

Another good example is Phineas Gage

Phineas P. Gage (1823–1860) was an American railroad construc­tion foreman remembered for his improba­ble[D] surviv­al of an accident in which a large iron rod was driven completely through his head, destroy­ing much of his brain's left frontal lobe, and for that injury's reported effects on his personal­i­ty and behavior over the succeed­ing twelve years—​effects so profound that (for a time at least) friends saw him as "no longer Gage."
[Fig. 1] The "abrupt and intrusive visitor".​[D][E]

Long known as "the American Crowbar Case"—​once termed "the case which more than all others is calculated to excite our wonder, impair the value of prognosis, and even to subvert our physio­log­i­cal doctrines" [34]—​Phineas Gage influenced nineteenth-century discus­sion about the mind and brain, particu­lar­ly debate on cerebral localiz­a­tion, and was perhaps the first case to suggest that damage to specific parts of the brain might affect personality.​[3]:ch7-9[13]

Gage is a fixture in the curricula of neurology, psychology and related disciplines, and is frequently mentioned in books and academic papers; he even has a minor place in popular culture.[F] Despite this celebrity the body of established fact about Gage and what he was like (before or after his injury) is remark­a­bly small,[G] which has allowed "the fitting of almost any theory [desired] to the small number of facts we have" [H]—​Gage having been cited, over the years, in support of various theories of the brain entirely inconsist­ent with one another. A survey of published accounts, includ­ing scientif­ic ones, has found that they almost always severely distort Gage's behavior­al changes, exaggerat­ing the known facts when not directly contradict­ing them.[G]

Two photographic portraits of Gage, and a physician's report of his physical and mental condition late in life, were announced in 2009 and 2010. This new evidence indicates that Gage's most serious mental changes may have been temporary, so that in later life he was far more functional, and socially far better adjusted, than was previously assumed. A social recovery hypothesis suggests that Gage's employment as a stagecoach driver in Chile provided daily structure allowing him to relearn lost social and personal skills.

http://en.wikipedia.org/wiki/Phineas_Gage

Now this in too light with the opposing, we have no examples of a mind without a brain
here is another example in MRI images
Live thinking person

And someone dead from traumatic brain injury