Tolstoy said, "When you understand your spiritual being and live with it, then instead of despairing, you understand the joy that can never be destroyed, which always grows."
In order to understand your spiritual being, you must begin to engage your soul.
In doing so, you will see that your soul can guide you. It will show you how to live a spiritual life, a life in harmony with your soul.
Of course, you must act on the wisdom you receive from the soul. That is where your real work lies.
And if you can implement your soul's wisdom into your daily life, you will find a joy that can "never be destroyed, which alway's grows."