First off, there is nothing "common" about grace. When the word is used in the writ I cannot possibly see how it is ever given to all head for head indiscriminately.
a) that which affords joy, pleasure, delight, sweetness, charm, loveliness: grace of speech
2) good will, loving-kindness, favour
a) of the merciful kindness by which God, exerting his holy influence upon souls, turns them to Christ, keeps, strengthens, increases them in Christian faith, knowledge, affection, and kindles them to the exercise of the Christian virtues
3) what is due to grace
a) the spiritual condition of one governed by the power of divine grace
b) the token or proof of grace, benefit
1) a gift of grace
2) benefit, bounty
4) thanks, (for benefits, services, favours), recompense, reward
Grace should never be confused with common benevolence.