Faith and rationality are two concepts that are important in many religions. Faith is believing in something without needing proof, whereas rationality means being able to explain why something is true, using evidence and facts. Faith might be believing in a higher power, like a God or spirit, or in the values of a particular religion. Rationality might be looking at the facts and evidence to see if something is true or not. So, faith and rationality can work together - it might be possible to use facts and evidence to support beliefs you have.