“Wherefore, my beloved, as ye have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling. For it is God which worketh in you both to will and to do of His good pleasure”
(Philippians 2:12-13)

Introduction
God created everything according to His will. There is nothing created that does not have a purpose, therefore God has a purpose for each of our lives. The apostle Paul states that God is working in those who have submitted themselves to Him. This submission means that we ought to please Him in every aspect of our lives. God’s activity in our lives must produce results, that is, what He is working in should be worked out. This is the divine cause and effect. How can we do His good pleasure?

We must accept His pardon
“Blessed be the God and Father of our Lord Jesus Christ, who hath blessed us with all spiritual blessings in heavenly places in Christ: according as He hath chosen us in Him before the foundation of the world, that we should be holy and without blame before Him in love: having predestinated us unto the adoption of children by Jesus Christ to Himself, according to the good pleasure of His will, to the praise of the glory of his grace, wherein He hath made us accepted in the beloved. In whom we have redemption through His blood, the forgiveness of sins, according to the riches of His grace; wherein He hath abounded toward us in all wisdom and prudence; having made known unto us the mystery of His will, according to His good pleasure which He hath purposed in Himself” (Ephesians 1:3-9).
Do we truly trust Christ? Are we assured of salvation? To fail at this point makes the whole Christian life a waste of time and a sham. Those who do believe in the life-changing, sin-forgiving power of the blood of Jesus Christ know that they are sealed in Him. If doubts should arise and cause a crack in assurance, faith quickly seals the fault. 
If we believe that God has forgiven us then we can assure our hearts that we belong to Him. This is the faith that the Holy Spirit uses to seal the agreement between God and man. Just as Elizabeth II adds her seal of approval to various products, the Holy Spirit stamps His seal on our lives the instant we exercise faith in the finished work of Christ on the cross. This authorising seal identifies us as fully fledged followers of Christ who have trust and confidence in God’s unchanging word … “But without faith it is impossible to please Him: for he that cometh to God must believe that He is, and that He is a rewarder of them that diligently seek Him” (Hebrews 11:6). Those who believe that they are saved know that they are “sealed unto the day of redemption” (Ephesians 4:30), and that God is involved in every aspect of their lives, “Nevertheless the foundation of God standeth sure, having this seal, The Lord knoweth them that are His” (2 Timothy 2:19).

We ought to sing God’s praises
“Praise ye the LORD. Sing unto the LORD a new song, and his praise in the congregation of saints. Let Israel rejoice in him that made him: let the children of Zion be joyful in their King. Let them praise his name in the dance: let them sing praises unto him with the timbrel and harp. For the LORD taketh pleasure in his people: he will beautify the meek with salvation. Let the saints be joyful in glory: let them sing aloud upon their beds. Let the high praises of God be in their mouth, and a twoedged sword in their hand; to execute vengeance upon the heathen, and punishments upon the people; to bind their kings with chains, and their nobles with fetters of iron; to execute upon them the judgment written: this honour have all his saints. Praise ye the LORD” (Psalm 149).
God takes pleasure in the praises and worship of those who have truly committed their lives to Him. This holds true for communal worship as well as our personal devotions. The worship God delights in is not the grovelling adoration of those trying to placate an angry deity, for such has always been the spiritless praise of false religion, instead it is the joyous worship of those who know that the Lord loves and beautifies them (:4). Unto God we offer “high praises” (:6) with clean hands and purity of heart (Psalm 24:3-4). These are the “joyful” ones that do not forsake the assembly of the saints (Hebrews 10:25).

We must obey God’s will
“I know also, my God, that Thou triest the heart, and hast pleasure in uprightness. As for me, in the uprightness of mine heart I have willingly offered all these things: and now have I seen with joy Thy people, which are present here, to offer willingly unto Thee” (1 Chronicles 29:17).
David understood that God takes “pleasure in uprightness”, but very few of our generation do! Walking uprightly is not the same as being a morally upright person. Man’s morality is according to his own desire, feeling, and world view. Perceived morality can be another man’s immorality. The absolute foundation for uprightness is God’s will not ours.
If God is to receive honour and pleasure from our uprightness then it follows that we have to “present [our] bodies a living sacrifice, holy, acceptable unto God, which is [our] reasonable service. And be not conformed to this world: but be … transformed by the renewing of [our] mind, that [we] may prove what is that good, and acceptable, and perfect, will of God” (Romans 12:1-2). We must avoid all that is offensive to Him, for David declared, “For Thou art not a God that hath pleasure in wickedness: neither shall evil dwell with Thee” (Psalm 5:4), but “The LORD taketh pleasure in them that fear Him, in those that hope in His mercy” (Psalm 147:11).

We need to walk in God’s presence
“The LORD thy God in the midst of thee is mighty; He will save, He will rejoice over thee with joy; He will rest in His love, He will joy over thee with singing” (Zephaniah 3:17).
God truly delights to be in the presence of His people … “For where two or three are gathered together in my name, there am I in the midst of them” (Matthew 18:20). Therefore it ought to be our delight to walk in His presence. In reality, the only thing that keeps us from His presence is sin. Adam and Eve learned this costly lesson (Genesis 3:8). 
If we aim to walk in the presence of the Lord then our feet are always on holy ground. On holy ground everything is sacred and dedicated to God. This means that nothing of this sin-polluted world is acceptable in the holy place (God’s presence). The desire of those who walk in the presence of God is never to trample upon the sacred or undermine true holiness, instead they adhere to the advice of Paul in Colossians 3:17, “Whatsoever ye do in word or deed, do all in the name of the Lord Jesus, giving thanks to God and the Father by Him.”

Conclusion
Moses, in Deuteronomy 6:5, says, “Thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might.” The Lord Jesus Christ calls this the “great commandment” (Matthew 22:37-38). It is the highest duty of the true child of God to please Him in every way, to do everything, say everything, and behave in a way that honours Him. How can we hope to hear those words, “Well done, thou good and faithful servant … enter thou into the joy of thy lord” (Matthew 25:21) if we refuse to please God?