To take a car onto the road one requires a driving licence, but to use words one requires nothing. This is dangerous, for words are dangerous weapons in untrained hands . . . and religious words are the most deadly.
Do not believe in what you read in supposedly spiritual scriptures, or in what you hear from reputed sages. Only when you have worked things out for yourself, and know the indisputable Truth which is independent of any historical or scientific proofs - only then will you truly know the meaning of words.