Certainty or Faith?

Religion is like an hemisphere of a brain; and science is the other. They are both part of a whole.

It is like everything we did, do or will: spiritualism and materialism are impregnated in every act. When certainty can't be 100% complete, then we need some faith. But when certainty is almost null, then faith occupies almost 100% of it.

When you try to eliminate one of them, then an explosion occurs and you are placed on uncertainty (when faith is eradicated), or total regretfulness (when certainty is eradicated) ...

Sometimes you can be amazed, because things sometimes go the way you wanted to when you do what you thought that could be useless. Casualty, consequence or supernaturalism?