A symbol is indeed the only possible expression of some invisible essence, a transparent lamp about a spiritual flame; while allegory is one of many possible representations of an embodied thing, or familiar principle, and belongs to fancy and not to imagination: the one is a revelation, the other an amusement.
The only real knowledge is who you really are - a spiritual being created in the image in the likeness of a loving God. If you know that, everything you do will honor the wisdom and beauty you already own.
Seek ye first the kingdom of God, and everything shall be added unto you. This is the one great duty, this is renunciation. Live for an ideal, and leave no place in the mind for anything else. Let us put forth all our energies to acquire that which never fails-our spiritual perfection. If we have true yearning for realization, we must struggle, and through struggle growth will come. We shall make mistakes, but they may be angels unawares.
If you want to awaken all of humanity, then awaken all of yourself, if you want to eliminate the suffering in the world, then eliminate all that is negative in yourself. Truly, the greatest gift you have to give is that of your own self-transformation.