1st Way
A desire has been burning in you for a long time to minister to a specific type of person. This is not a passing fancy but something that has burned in you for a while. It could be a desire to bring unbelievers to know the Lord, it could be a desire to help fellow Christians in their daily walk. It might be a desire to help people know the truth. It might be a desire to warn people of certain dangers. Whatever it is, this thing has taken hold of you and will not let go.
The call of God comes from God and not you. All you can produce in yourself is sin. Paul says in Romans 7:18 For I know that in me (that is, in my flesh,) dwells no good thing: for I really want to [do good] ; but [how] to practice that which is good I find impossible.
The desire to do the work of God is planted by God and grows over a period of time. If you desire to do something for God’s glory then it must have come from Him. If it does not fade over time then it is not an emotional fantasy but something real
2nd Way
Not many people share your enthusiasm for what you want to do. They may warn you to be careful, to calm down. They might even accuse you of being paranoid. They tell you not to ‘rock the boat.’ You have begun to wonder if this thing is of the Lord.
Since each person is like a different part of the body, you could be an eye or ear – there are only two of those in the body. Or you might be a nose – there is only one. Your ministry is unique, so do not expect others to share your burden for ministry. The fact that you want to do something different could be proof that this desire is from the Lord.
3rd Way
Your desire is other-oriented. You are not so much concerned with making a name for yourself as you are with helping other people. You will gladly give up things that are important to you so that other people may benefit from your actions.
Ministry is servanthood and is likely to cost you a lot. If your desire is not to help others then it is not a calling to ministry. Jesus said in Matthew 20:27-28 27 And whoever will be chief among you, let him be your servant: 28 Even as the Son of man did not come to be ministered to, but to minister, and to give his life a ransom for many.
4th Way
Over a period of time, you have found yourself ministering to a particular area of need more than others. It seems that you always end up on a particular subject or type of ministry. And when you do something happens inside you and you sense a surge taking place.
The Lord will prepare you for ministry by creating opportunities for you. Often you will not be aware of this. You only know that you feel content doing certain types of ministry. If your ministry is evangelistic you end up sharing the gospel with unbelievers all the time, and it gives you a great sense of accomplishment.
If your ministry is to believers, you find yourself ministering more to fellow Christians than to the unsaved. You might find that your greatest ministry lies in prayer. These are all signposts showing you the way.
5th Way
People have told you that you have helped them, even when at times you have not been aware of it. Sometimes others can see your ministry more clearly than you can see it yourself.
Solomon said in Proverbs 18:16 A man’s gift makes room for him, and brings him before great men
If you have a calling you will not be able to hide it. It will start to show itself in time and others will begin to notice it.
6th Way
You feel unqualified to do the work of the Lord and usually feel unworthy to push yourself forward to suggest that you be given an opportunity. When appeals are made for help you wait for everyone else to step forward first before you offer your services.
Humility is a sure sign of your genuineness. The Spirit of God always leads gently. He is likened to a dove, that is meek and easily frightened away. Jesus is called the Lamb of God. A lamb is also a gentle creature that does not push its way. Since the call comes gently, you may even wonder at times if you heard right.