You need is conviction. There are three types of conviction: reading God Speaks can give you intellectual conviction; this is the first type. But as God exists, you must see Him. Seeing Him everywhere brings conviction through sight. You see Him in all things, everywhere, as the infinite Ocean of Effulgence. You see God in everyone and everything. This is the beginning of real longing — to become one with the Beloved, God. Once you have this experience there will be no more worries and nothing can disturb you.
The fulfillment of the longing for union with God is to become God. This is the third and highest
type of conviction.