Devotion in buddhism is actually trusting in cause condition and effect. It is something that the scientists do. If you cook an egg, you need a certain cause and condition. Stove, pot, water, fire, gas, whatever. And if you have no obstacle, egg will be cooked. And you can trust on that. That is how for centuries people cooked that egg. Because of that. And that trust in cause condition and effect is so called devotion in buddhism.