Isaiah 54:10 For the mountains shall depart, and the hills be removed; but my kindness shall not depart from thee, neither shall the covenant of my peace be removed, saith the Lord that hath mercy on thee.

Matthew 5:7 Blessed are the merciful: for they shall obtain mercy.

Matthew 9:13 But go ye and learn what that meaneth, I will have mercy, and not sacrifice: for I am not come to call the righteous, but sinners to repentance.

Romans 9:16 So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy.

Romans 9:23 And that he might make known the riches of his glory on the vessels of mercy, which he had afore prepared unto glory,

Luke 6:26 Be ye therefore merciful, as your Father also is merciful.

Hebrews 8:12 For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more.

Ephesians 2:3-5 Among whom also we all had our conversation in times past in the lusts of our flesh, fulfilling the desires of the flesh and of the mind; and were by nature the children of wrath, even as others. But God, who is rich in mercy, for his great love wherewith he loved us, Even when we were dead in sins, hath quickened us together with Christ, (by grace ye are saved;)

Mercy is the end result, the action, but it is grace that is the motivating force.

John 21:15 So when they had dined, Jesus saith to Simon Peter, Simon, son of Jonas, lovest thou me more than these? He saith unto him, Yea, Lord; thou knowest that I love thee. He saith unto him, Feed my lambs.

Now before you reject my thoughts that service is a promise hear me out. The whole premise of service to the Lord is love. The indwelling love of God is a compelling force to fulfill and satisfy that love. Love does not and cannot sit idle within us, it is a compelling force to reach out and touch lives. It is for this very purpose for which we were created and called.

Ephesians 2:10 For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.

Before ordained, that is the language of promise.

Romans 12:1 I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.

2 Timothy 1:11 Whereunto I am appointed a preacher, and an apostle, and a teacher of the Gentiles.

1 Corinthians 12:28 And God hath set some in the church, first apostles, secondarily prophets, thirdly teachers, after that miracles, then gifts of healings, helps, governments, diversities of tongues.

Ephesians 4:11-12, 16 And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers; For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ: From whom the whole body fitly joined together and compacted by that which every joint supplieth, according to the effectual working in the measure of every part, maketh increase of the body unto the edifying of itself in love.

Every one of us has a part to perform, whether it be service gifts or power gifts, we are obliged to use those gifts to serve and complete the body of Christ.