Verse 45

आदावन्ते च यन्नास्ति वर्तमानेऽपि तत्तथा ।योऽभिवाञ्छत्यसद्राम तस्यासत्तैव दृश्यते

In plain words

That which does not exist at the beginning or the end is likewise so in the present too. He who desires the unreal, Rāma -- of him, non-being alone is seen.