Most things that are true are simple. To lose weight, eat less than you burn. To reduce stress, find a job you love. To resolve conflict, be patient and peaceful. These are very, very simple in that they are complete concepts that take no more than a sentence to say. They are not, however, easy, because they must be applied consistently.
Always, the eye sees more than the mind can comprehend, and we go through life self-blinded to much that lies before us. We want a simple world, but we live in a magnificently complex one, and rather than open ourselves to it, we perceive the world through filters that make it less daunting.