Prabhupada describes the devotees as valuable jewels. If we have a valuable jewel in our hand, we will hold it tightly so we do not lose it. Similarly, the Supreme Lord holds His devotees tightly in His hand because He considers them valuable. The Lord promises to always give protection especially to those devotees who have no desire other than to satisfy Him. Devotees consider devotion to the Lord the most valuable possession they could have, and therefore they are always striving to attain it.
LFD Vol 2 Pg 259, 2nd Paragraph