trust

why is it so hard to trust God? He is all i need, for anything and everything. but this western modern world provides so many conveniences that say i don't need Him. i don't need to trust Him for my daily bread..i can just walk down the street to the store. my life isn't threatened daily...no need to trust Him to keep back the sword. why can't i trust Him? i don't even understand how important He is to my life. every moment i'm alive is because He is causing that to be. i just read a book by francine rivers called the warrior, and it's all about caleb and the israelites from egypt to the conquering of caanan. he had amazing trust in God. he almost didn't go a day without believing the Lord is God and the Lord will provide. the book shows his frustration with the people of Iserael, and how they trusted in themselves, in their skills (or lack thereof) to fight the caananites and claim the land the all mighty Lord said was already theirs. to trust God like that....simply, completely, wholly. i want a faith like that.