Isvara's supplying to his jivas a material body as a support to their dormant consciousness (in order to facilitate its expression) is surely the biggest act of kindness shown by the Lord towards His creatures.
Again, without a general policy of preservation, mere creation would have no meaning. Imagine a scenario where we have babies (or foetuses, for that matter) taking birth and then dying (or passing out of existence) within micro-seconds of their coming to life! The Lord (who is Visnu) must also implement a policy of preservation in order to sustain the jivas. He has to ensure orderly working of the various mechanisms and processes of the body at least till some stage of maturity of the pinda-brahmanda. This also the Lord does. This is His second big act of grace to his jivas.
Sankaradeva says in his rendering of the Bhagavata that 'the Lord does the work of preservation by Himself' (isvare apuni palanta) which probably means that unlike in the case of creation--where there may be involved, after the phase of primary creation is over, a material unit like Brahma, to preside over the unfolding of the process of (secondary) creation--the involvement of the Lord in the implementation of His preservation-policy is direct and more active.
Can there be a more direct proof of the Lord's grace towards us jivas? Our life itself is the biggest proof and reminder of the reality of Krsna's love for us. Sankaradeva in his Bhakti Ratnakara has eulogized the human body (nara tanu) and devoted a whole chapter to it, The Glory of the Human Body (nrdeha mahatmyam). Madhavadeva, in his Nama Ghosa, has devoted verse after verse to the singing of the glories of that Lord who, as Paramatma, is personally associated with His creatures and whose grace is felt by the jiva in each and every stage of development of his consciousness. The Nama Ghosa, it must be remembered, like the Bhagavata, is an intensely paramatmic text. It sings the glory of the immanent Lord.
It is in the light of this supreme kindness of the Lord that we jivas must take eka-sarana or sole-refuge in Krsna. For it is for the realization of this supreme truth and for receiving this supreme teaching that we have been equipped with our material supports in the first place. If we fail to take sole-refuge and lay to waste this opportunity, then this human body, this most precious nara tanu, will, undoubtedly, have gone in vain.