Paul writes in 1 Corinthians 15:1-11… Now I make known to you, brethren, the gospel which I preached to you, which also you received, in which also you stand, 2 by which also you are saved, if you hold fast the word which I preached to you, unless you believed in vain. 3 For I delivered to you as of first importance what I also received, that Christ died for our sins according to the Scriptures, 4 and that He was buried, and that He was raised on the third day according to the Scriptures, 5 and that He appeared to Cephas, then to the twelve. 6 After that He appeared to more than five hundred brethren at one time, most of whom remain until now, but some have fallen asleep; 7 then He appeared to James, then to all the apostles; 8 and last of all, as to one untimely born, He appeared to me also. 9 For I am the least of the apostles, and not fit to be called an apostle, because I persecuted the church of God. 10 But by the grace of God I am what I am, and His grace toward me did not prove vain; but I labored even more than all of them, yet not I, but the grace of God with me. 11 Whether then it was I or they, so we preach and so you believed.
Martyn Lloyd-Jones writes…
The gospel of God’s Son starts with the evangelistic message, but it does not stop there. It goes on to teach—and, indeed, teaching is a part of the evangelizing if it be true evangelism. Indeed, let me put it like this—all the profound doctrines of the Epistle to the Romans come under the heading of ‘the gospel of his Son’. All is the good news from beginning to end; and nothing must be left out.
As you talk to other people whose whole position you may feel to be questionable, the first thing to do with them is to make them talk. Get them to talk about what they conceive a Christian to be; and if they regard themselves as Christians get them to state why they regard themselves as Christians. Encourage them to talk along those lines, and as they do so concentrate on one thing only—does the name of the Lord Jesus Christ come into it at all or not, or how much?
You will find quite frequently that people will talk at great length without even mentioning His name. The test which I have always found to be crucial is to ask such a person this question, ‘If you had to die tonight and to stand before God, what would you say? On what would you rely? What would your position be?’
(Martyn Lloyd-Jones: The Gospel of God, 219–20 & The Law: Its Functions and Limits, 35)
Indeed, let me put it like this—all the profound
doctrines of the Epistle to the Romans come under
the heading of ‘the gospel of his Son’.
All is the good news from beginning to end;
and nothing must be left out.
*Emphasis Mine-Pictures Not Mine.