Perfect is also the enemy of good. We can't let the fear of knowing even better in the future keep us from making progress against the mistakes of the past, or

Perfect is also the enemy of good. We can't let the fear of knowing even better in the future keep us from making progress against the mistakes of the past, or nothing will ever change. In a lot of cases, knowing better in the future only happens if we take the step today and learn that we don't yet know everything. If we never take the step now, we'll never have the future knowledge to do even better.