Sarva-samvadini is a supplement to the Ṣaṭ Sandarbha of Śrī Jīva Gosvāmī. In this book Śrī Jīva Gosvāmī adds extra information on certain topics discussed in the Sandarbhas. It is in this book that he names the philosophy and theology of Śrī Caitanya Vaiṣṇavism as Acintya-bheda-abheda. The language of the book, however, is highly philosophical. Paṇḍita Ānanda Gopāla Dāsa of Jīva Institute has written a lucid commentary on it in Sanskrit. This is the maiden commentary on this important work. It is a must for those who really want to dive deep into the siddhānta of Caitanya school
The mind does not like to be in the present. It keeps on fluctuating between the past and future. A person who has a stable mind means they stay in the present. They are not in anxiety about the future, and they are not troubled by the past.