MEDITATION

If to be meditate, any of form(shape) should be meditated. Don't be formless(shapeless). let it be in form. let not to be meditated as formless. Later, Form dissolves into formless. Being in Dhwaidham takes into Adhwaidham.
How come,
Observer get destroyed in Adhwaidham. Observer's object get destroyed in Adhidham. Its verity.

Reference:

[1] Thiruvarut Prakasa Vallalar, ‘Thiruvarutpa’, ‘Urainadaipakuthi’, ‘Dhiyanam’ Thiruvarut Prakasa Vallalar Deiva Nilayam, pp. 398, May 2004.