1. Different people has different types of grace because of different calling.
1Pet 4:10 As each one has received a special gift, employ it in serving one another as good stewards of the manifold grace of God.
Paul's own calling in Eph 3:7... I was made a minister, according to the gift of God's grace which was given to me according to the working of His power.
Those who want get right by following the Laws according to his own ability has fallen from grace. Gal 5:4. Heb 4:16 tells to approach the throne of God not just for mercy (forgiveness) but to find grace power for our need.
After Posting Note: Some have expressed concern that this definition of Grace took away the 'unmerited favor' of God. The 'unmerited favor' of God is in Mercy. We don't loose anything with redefinition. We gain better understanding and effectiveness in our living relationship with God. God's love gives us Mercy, Peace and Grace.