Do you know what  is the difference between destiny and purpose?
Destiny is to purpose as the acorn is to the oak tree. 
Your destiny is the divine intention of you. The acorn does not know that it is destined to become the oak tree. Destiny can only be realized in retrospective. The Destiny Code is written in the Soul and then in our DNA, in our subconscious, the personal proclivities, inclinations, and predispositions we do not have an explanation for, our innate talents and natural gifts. The Soul know our destiny, where our personality is clueless, hence it can never explain within reason why it likes something more than other.  

We can not know of our destiny, looking from inside out. It reveals itself to us only through the soft language of the heart, omens," aha moments" fleeting insight; the faint calling of the Soul to which most have long turned a deaf ear to for the sake of rationale and logic. Destiny makes itself known through intuition and prophetic dreams, AHA Moments or life lessons if our ego permits us to recognize the value in the message. Destiny also can be sensed by finding Meaning of synchronicity and serendipity and the de-ja-vue, but the only guaranteed way to know your destiny is to live it.
Your purpose is to find your destiny and to follow it. For an acorn to become the oak tree is not an easy task. An acorn has to roll far enough from the tree to find fertile soil and water and to be away from the shadows of other trees so it can get enough sunlight. It must grow healthy with a deep root system, for "As above, so below." The branches will only spread as wide as the roots. It must attract the right life, host and nurture that life so it can protect it from pests and disease. It has to grow strong enough to sustain the wind but too strong where it won't bend, inflexible it will snap under the forces. It also has to bear fruit and give shade, for the fruitless tree are cut for wood.

It is the same for us. We must leave the nest and find an environment in which we can thrive. Next, we must become independent and self-sustained. We need strong roots, our family, and equally reliable network, branching out. We need to attract the right people around us to support us and our purpose and protect us. In the process, we must ascend from self-sustained to self-reliant. We must be firm but not inflexible in Body and Thought; we need to learn to bend the other way, forgive and accept to adapt. We also need to be productive and contribute to society to leave a legacy, so others can grow and be nurtured because of us.

Your purpose is to learn first and then do all that is necessary to live your destiny.