Shri Ramadasa Charitam III Vol III Book VIII Chp 14 Shlokas 1 - 2
श्रीसद्गुरुरुवाच
शुद्धचिद्घनरूपोsयं परमात्मा सनातनः |
तत्तद्देवस्वरूपेण प्रतिभाति न संशयः ||
परमात्मा निराकारो वस्तुतः पुरुषोत्तमः |
तथापि भक्तवात्सल्यान्नानारूपो भवेत्स्वयम् ||
Shri Sadguru said
The infallible and endless Supreme Being who is the very embodiment of wisdom expresses Himself as per the desires of the different bhaktas. In reality, the Purushottama, the supreme Being, is formless. Yet due to His love for the bhaktas, He assumes many forms