Hashem created the world to bestow his love upon His creation.
Hashem did not need to create; He is complete as is. However, He decided to create entities other than Him in order to bestow His kindness.
In His kindness, He thus created a world specially designed for human beings based on perfect natural laws; a world filled with beauty and wonder.
The bountiful channels of blessings are continuously open and active from Hashem towards us. The primary cause of obstacles in these channels is our unrectified (improper) behaviour.