It's not really the same thing. Religious people can't prove what they believe in, and they claim just to 'know it to be true', because 'faith is a gift'. However, scientific postulates must be proven to be accepted. Until you can prove otherwise, they are true.
Granted, science may not have all the answers, and the few answers it does have are perhaps only applicable to the small parcel of reality in which we exist, but within those parameters, science is much more solid than religion. From a pragmatic standpoint, anyway.
It all comes down to the old question, what can you believe in, and what is real. You can make up any number of answers for that, and nobody can really prove you wrong, since there isn't an exact definition of reality. However, I for one prefer to believe in what at least seems to be real. That doesn't mean I'm right, even though you need to be able to prove me wrong in order to present an argument.
And no, I don't take any drugs.