The reason as to 'why' we exist is because of God's love. The reason as to 'how' we exist is because of God's wisdom.The purpose for our existence is twofold, 'To be loved' by God, and 'to love' God and His children.
Jesus said in Mark 12:30-31 And thou shall love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength; this is the first commandment. And the second is like, namely this, Thou shall love thy neighbor as thyself. There is none other commandment greater than these.
The Word of God tells His children that they are to grow in the understanding of God's wisdom to love as He loves.
Proverbs 4:7 Wisdom is the principal thing, therefore get wisdom, and with all thy getting get understanding.
Jesus said in John 15:12 This is my commandment, that ye love one another as I have loved you.
What Is Our Purpose?
The Lord commands His children to pray and allow His Spirit of truth to lead them in all of their words and actions. God also commands His children to extensively pray and review the truth of the history of their past words and actions in comparison to the truth of God's Word. This comparison of truths equals a basis to grow from for a purification process that is two-fold. This purification process consists of learning the wisdom of one's own evil within themselves for the sake to be able to shed it along with learning the understanding of the wisdom to love as God loves. Jesus offers the easier option to voluntarily shed evil and grow in the wisdom to love, and if not, Jesus helps His children become aware of their truths through life lessons along with other means. This refining process is used to immerse all of God's children to grow 'as one together' within the purity, peace, and love, of the Spirit of the Father, Jesus, and the Holy Spirit.
2nd Corinthians 13:5 Examine yourselves, whether ye be in the faith, prove your own selves. Know ye not your own selves? How that Jesus Christ is in you except ye be reprobates? (Condemned/held to task to truth).
Ephesians 4:14-16 That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, thereby they lie in wait to deceive; But speaking the truth in love, may grow up into him all things, which is the head, even Christ: From whom the whole body fitly joined together and compacted by that which every joint supplies, according to the effectual working in the measure of every part, making increase of the body unto the edifying of itself in love.
Jesus is a Spirit of love who has many Holy traits such as truth, humility, gratitude, grace, mercy, sacrifice, and obedience. No matter how long that someone could live, they do not become Jesus. Therefore, with all things, including with love, there is room to seek greater levels of purity including with the truth, humility, gratitude, grace, mercy, sacrifice, and obedience of Jesus. Jesus prayed and was obedient to all of the Father's will.
1st John 2:6 He that says he abides in him ought himself also so to walk, even as he walked.
1st John 3:16 Hereby perceive we the love (of God), because he laid down his life for us: and we ought to lay down (our) lives for the brethren.
The words and actions of Jesus were always within the Father's Holy love, selflessly giving back every gift of love that He received. Therefore, Jesus received and gave a fulfillment of blessings for the eternal glory of God. The ultimate act of love that a child of God can do is to be submissive and pray to receive and give back their fulfillment of blessings, including by bringing as many people as possible within their lifetime to the hope and everlasting love that is Jesus.
Peter 4:10-11 As every man has received the gift, even so minister the same one to another as good stewards of the grace of God. If any man speaks, let him speak as the oracles of God; if any man minister, let him do it as of the ability of which God gives; that God in all things may be glorified through Jesus Christ, to whom be praise and dominion forever and ever. Amen.
1st Epistle of John 4:8 He that loves not, knows not God; for God is love.
"Father, in the name of Jesus, I surrender my day and my life to you. I repent my sins. Please forgive me. I confess that Jesus is the Son of God and my Savior, rising from the dead on the third day. I surrender all aspects of myself and my life to you. Lord, guide me to do your will, to go wherever you want me to go and to do whatever you want me to do for the glory of your eternal Kingdom. I humbly ask you to give me blessings beyond my imagination so that I can use them to give back to you and your children. Amen."