Mathew 12:33,35

Either make the tree good and its fruit good, or make the tree bad and its fruit bad; for the tree is recognized and judged by its fruit.  The good man, from his (inner) good treasure, brings out good things; and the evil man, from his (inner) evil treasure, brings out evil things.

Our spiritual life matters because what we believe, trust, and focus on we will express in word and deed.  That is why time matters when it comes to spending it on the word of God.  The word transforms any darkness and confusion into light and helps us walk as light.