For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.
I'm not clear on what is meant by "don't realize or use the grace He has given me"? To me, every moment of the earthly lives of all humans (saved OR unsaved) is an example of God's grace (undeserved mercy) -- an opportunity for the unsaved (which encompasses all of us by nature before the Holy Spirit brings us to faith in Christ) to respond to the Spirit's call by placing their faith in Christ for salvation and eternal life (which can be obtained in no other way), and for the redeemed to use the time that God has given to them in service to Him and others as thanks for the redemption that faith in Christ has made possible for them. Without that grace, all of us would be irretrievably, eternally lost and separated from God.