We, always, always need to be concerned with the why. Without a doubt, to discover and embrace our purpose in life, and to act from that state of ecstasy, or passion. Full time, not some time, or part time, but all of the time. That's the sole purpose of The Passion Principles, to assist you on your journey of living life to the fullest. Principles are similar to Universal laws.
Universal laws are consistent.
They never change. Only people change. The sun coming up the next day, and the moon coming out at night, is the Universal Law in full force. It never changes. The Universe has a set rotation, governed by God, that never fails.