To have purpose in life is what we are created for. We don’t exist to just use up oxygen, but purpose in life is that which gives you a reason for living, the reason why God put you here on earth, it’s an expression of your personal significance to God, and it’s unique to you based on God’s personalised plan for you.
You might have several purposes, depending on the major roles in your life. You might be a parent, teenager, spouse, and responsible worker in a factory, whatever it might be. For example, a teenager’s purpose may be: to grow in Christ-like character – “For those God foreknew he also predestined to be conformed to the likeness of his Son.” (Romans 8:29); to bring honour to his parents – “Honor your father and your mother.” (Exodus 20:12); to be the best student he can possibly be in order to bring glory to God – “Whatever you do, work at it with all your heart, as working for the Lord, not for men.” (Colossians 3:23)
Some purposes might even change, depending on the major changes in your life. For example, a former student may marry and have children. Therefore, some of his former purposes as a student are no longer applicable. Now, his major life purposes may be: to grow in Christ-like character – “For those God foreknew he also predestined to be conformed to the likeness of his Son.” (Romans 8:29); to sacrificially love his wife as Christ loved the church – “Husbands, love your wives, just as Christ loved the church and gave himself up for her.” (Ephesians 5:25); to teach his children by lifestyle
“Love the Lord your God with all your heart and with all your soul and with all your strength. These commandments that I give you today are to be upon your hearts. Impress them on your children. Talk about them when you sit at home and when you walk along the road, when you lie down and when you get up.”