Because God is perfect, his handiwork functions in accord with immutable principles. By the full use of our God-given powers of reason and observation, it ought to be possible to discover these principles. These were the crucial ideas that explain why science arose in Christian Europe and no where else.
Not only were science and religion compatible, they were inseparable–the rise of science was achieved by deeply religious Christian scholars.
Because God is a rational being and the universe is his personal creation, it necessarily has a rational, lawful, stable structure, awaiting increased human comprehension. This is the key to many intellectual undertakings, among them, the rise of science.