...that ugle word guilt

why is it that whenever i feel the need to create, i mean "really" get down and dirty, messy, painterly creative, i suddenly have this huge guilty feeling settle upon me?  it settles in the form of nasty little thoughts like..."but chrissy, you have laundry all over your bedroom floor" or "you haven't scrubbed the kitchen tile in weeks" or "the kids lunch sacks shouldn't go to school empty one more day" (okay, not really empty, but to listen to my kids some days, you'd think i never went shopping. ever. never)  how does one put aside all the things, the endless list of things that need to be done in a day, without the guilt, and sit down to happily create?