I have to agree with A Paduan here;
Kindness and deserving are two separate concepts
I think that by using the word undeserved, the Society continually emphasises the negative, i.e. we are all pityful sinners, undeserving of God's grace and favour.
Grace on the other hand is what God offers to all mankind with no strings attached, God's grace is not conscious of man's sin. Therefore, grace is a much better expression.
Interestingly, John 1:16 reads
On his fullness we all of us have drawn, and from him we have received grace upon grace
Eyeslice