sin is - missing the mark, falling short of a standard, knowing to do good, and not doing so. so, can you, by these Biblical measurements, not feelings and emotions, but by these measurements, say you do not sin?
and, the 24 hour period is meaningless, one sin in one lifetime breaks the relationship with a pure and holy transcendent God. that is why we need a perfect Savior, and His pureness, we can never be pure enough.