It has been estimated that there are 10 billion stars in our galaxy alone. In the observable universe there are trillions of galaxies. The "average" star has at least one planet, meaning that there are a huge number of planets!
Somehow I cannot believe this life alone is "it". Some estimate there are 10 to the power of 25 planets. This is a truly staggeringly large number.
Most religions are very "Earth centric". What is certain is we only can know very little with our small brains.