'kṛṣṇa-tattva', 'rādhā-tattva', 'prema-tattva-sāra'
'rasa-tattva' 'līlā-tattva' vividha prakāra
kṛṣṇa-tattva - the truth about Kṛṣṇa; rādhā-tattva - the truth about Rādhā; prema-tattva-sāra - the essence of Their loving affairs; rasa-tattva - the truth about transcendental mellows; līlā-tattva - the truth about the pastimes of the Lord; vividha prakāra - of different varieties.