Most Christians have a thought that secular work is of no significance and that only Pastors, Ministers, Missionaries and other full-time Gospel workers do a meaningful work. The major problem with this idea is that, Christians who believe this view tend to get disinterested in their secular work and do not enjoy it and fail to glorify God in it.
If you are a Christian, your entire life should be a ministry. Everything that you do in thoughts and words and actions are supposed to bring glory to God. There is no secular and sacred division in your life. Every part of you and your life should be for God's glory.
All sort of legitimate work is good and you can use any legitimate work environment to glorify God. If you are a Christian, the world is watching you. If you are not providing for your own self and your family, what sort of impression will it create about your God?
But the purpose of work goes beyond provision for you and your family. It is about your calling and purpose.
Work is one of God's good ideas. Even before sin entered the world, work was there. We are called to create and work like God. God Himself worked for six days and rested on the seventh day. God created Adam and asked him to work in Eden. God did not ask Adam to just sit idle all the time. Doing the work that God has given you can become an act of worship if you do it with proper attitude.
Paul did not ask all the believers to come with Him to preach full time. He asked all Christians to Serve the Lord wherever they are called to. Read Colossians 3:23.
Some have a calling to preach full time as missionaries and various other roles. Some have a calling to be workplace ministers of Jesus Christ. This doesn't mean that you should go to work only for the purpose of preaching the gospel to someone directly. When you work with a mindset that you are working for God and do your best to give your best at work, God will be glorified. But, if you work solely to please people and gain earthly rewards, you cannot expect your reward in Heaven. God sees your motives and attitude.
Christians are called to be the Salt and Light on earth. We cannot be salt and light of the world if we are totally away from the world. God has put as where we are or a purpose. We are to walk in the World differently as ambassadors of Christ. The World needs Set Apart Christian Doctors, Teachers, Software Engineers, Students, Drivers, Police Officers, Pilots etc. We cannot be Christians and be no different from the World. When you Shine by the Power of Christ, God is Glorified.
Matthew 5:13-16- Ye are the salt of the earth: but if the salt have lost his savour, wherewith shall it be salted? it is thenceforth good for nothing, but to be cast out, and to be trodden under foot of men.
I got saved in my School, through a Teacher. Everyone is not going to come to a Church building or a Christian Meeting to hear the Gospel. You may be the Gospel carrier for your Co-Worker.
Invite God to your secular work environment and glorify God in the workplace, where we are called to spend most part of our time. You are wasting your time if you don't let God to be part of your secular work.