Sathya Sai Baba tells us not to consider the physical body as permanent. He tells us not to be attached to the physical form of a particular Avatar but ratherto the Divinity as the formless, attributeless Parabrahma. He discusses concentration, contemplation and meditation and says that,
The stage wherein the mind is unwavering and firmly fixed on the higher reality alone can be called meditation.
He says that without love, your meditation will not achieve the desired result. Your love for God should be continuous through day and night. And he says that t>oo much talk is not good, even from the health point of view.
This discourse, in the Sathya Sai Speaks series, is in this pdf file, titled Love God And Meditate On Him.
The video below shows extracts from this discourse, with English captions provided by Satish Naik.