Self-confidence today is manifest only in matters relating to worldly achievements and self-centered pursuits. Faith and confidence are not in evidence in the spiritual field. Without unwavering faith, the Divine cannot be experienced. Because of the absence of firm faith, the formal observance of spiritual practices yields no results.
The primary requisite is unqualified and unshakable faith in God. One-pointed devotion promotes spiritual earnestness. The earnest seeker gets knowledge of the Self. The earnest devotee needs no other qualification except deep faith. He needs no other knowledge, no title to lineage or wealth. He may belong to any caste or community. He may be a child or even an animal.
(SSS Vol XIX - Chap 20)