I admit to being more than a little in love with life. I wish I could hug the universe just because being alive within it is a joyous thing to feel.
However, there isn't much modern writing which falls in the category of the simply celebratory. For those who feel the world is closing in, or that it is collapsing around their ears, take a dandelion break with any any poem by e.e. cummings. Or Google him; there are several websites dedicated to this poet and author. In cummings' world, slatterns are the subject of love sonnets and even crumbs become mysterious. If you haven't discovered the craziness in a daisy, then let your soul arise and sing with any collection of his.