Mark 16:15 And he said unto them, Go ye into all the world, and preach the gospel to every creature. 16 He that believeth and is baptized shall be saved; but he that believeth not shall be damned (condemned).
First of all we need to have understood and obeyed the gospel that we are intending to preach. If the gospel we preach is not that of the Apostles we have a problem.
Galatians 1:8 But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed. 9 As we said before, so say I now again, If any man preach any other gospel unto you than that ye have received, let him be accursed.
Secondly we need to have a logical reason why we ourselves believe the gospel.
1 Peter 3:15 But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear:
We preach not just by word of mouth, but by the way that we live.
Matthew 5:16 Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven.
Philippians 2:15 That ye may be blameless and harmless, the sons of God, without rebuke, in the midst of a crooked and perverse nation, among whom ye shine as lights in the world;
Preaching the gospel is of little value if we do not live by it.
Matthew 25:40 And the King shall answer and say unto them, Verily I say unto you, Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me.
Matthew 25:45 Then shall he answer them, saying, Verily I say unto you, Inasmuch as ye did it not to one of the least of these, ye did it not to me.
Within the church (Greek – ‘ecclesia’ – a congregation of believers, not a building) the role of women as teachers is proscribed.
1 Corinthians 14:34 Let your women keep silence in the churches (ecclesias): for it is not permitted unto them to speak; but they are commanded to be under obedience, as also saith the law.
1 Timothy 2:12 But I suffer not a woman to teach, nor to usurp authority over the man, but to be in silence.
But there is no restriction on preaching privately to those we come into contact with in our daily lives.
An example is given in Acts 18:26.
Acts 18:26 And he began to speak boldly in the synagogue: whom when Aquila and Priscilla had heard, they took him unto them, and expounded unto him the way of God more perfectly.
Preaching the gospel is not to be seen as a profession, it is to be done freely.
Matthew 10:8 ...freely ye have received, freely give.
I hope you have found this helpful.
May God bless you,