Those without are those separate from Messiah, without God in this world. Paul wrote about to them to the Ephesians and us.
“Therefore remember that once you, the Gentiles in the flesh, who are called “uncircumcision” by that which is called “circumcision” (in the flesh, made by hands), that you were at that time separate from Messiah, alienated from the commonwealth of Israel, and strangers from the covenants of the promise, having no hope and without God in the world. Ephesians 2:11-12
By seeing your good works they come to God. Beloved, I beg you as foreigners and pilgrims, to abstain from fleshly lusts, which war against the soul; having good behavior among the nations, so in that of which they speak against you as evildoers, they may by your good works which they see, glorify God in the day of visitation. 1 Peter 2:1-12
Those without have observed the fruit of the Spirit (Gal 5:22-23; Eph 5:8-10) and the unity of the Spirit (Eph 4:1-7) in the good works we walk in. Our good works make an impression. “Many an unbeliever that originally considered Christianity a huge fraud has been led to reconsider his first impression by the conduct of the confessing believers. Exact observation, closer acquaintance, showed him the injustice of his position. And when the grace of God was then proclaimed to him, when God visited him with the gracious Word of the Gospel, his heart was changed in favor of the Christian religion, he accepted its truths, he glorified God, whom he now recognized also as his Father for the sake of Jesus” (Kretzmann).
God visits those without through the body of Messiah. At the right time He prompts an acquaintance of one of us to have a heart to heart talk about Messiah Jesus and our acquaintance with Him. The grace of God dawns on them. “But you are a chosen race, a royal priesthood, a holy nation, a people for God’s own possession, that you may proclaim the excellence of him who called you out of darkness into his marvelous light. In the past, you were not a people, but now are God’s people, who had not obtained mercy, but now have obtained mercy” (1 Peter 2:9-10).
They are saved when they repent and are baptized in the name of Jesus Christ. “Now when they heard this, they were pierced to the heart, and said to Peter and the rest of the apostles, “Brethren, what shall we do?” Peter said to them, “Repent, and each of you be baptized in the name of Jesus Christ for the forgiveness of your sins; and you will receive the gift of the Holy Spirit. “For the promise is for you and your children and for all who are far off, as many as the Lord our God will call to Himself” (Acts 2:37-39). NASB
“For the grace of God has appeared, bringing salvation to all men, instructing us to the intent that, denying ungodliness and worldly lusts, we would live soberly, righteously, and godly in this present age; looking for the blessed hope and appearing of the glory of our great God and Savior, Yeshua the Messiah, who gave himself for us, that he might redeem us from all iniquity, and purify for himself a people for his own possession, zealous for good works” (Titus 2:11-14).
Walk in wisdom toward those who are outside. “Continue steadfastly in prayer, watching in it with thanksgiving, praying together for us also, that God may open to us a door for the word, to speak the mystery of Messiah, for which I am also in bonds, that I may reveal it as I ought to speak. Walk in wisdom toward those who are outside, redeeming the time. Let your speech always be with grace, seasoned with salt, that you may know how you ought to answer each one” (Colossians 4:2-6).
May our God “count you worthy of the calling, and may He fulfil all the good pleasure of goodness, and the work of the faith in power, that the name of our Lord Jesus Christ may be glorified in you, and ye in him, according to the grace of our God and [the] Lord Jesus Christ.” From 2 Thessalonians 1:11-12 YLT
But the end of all things is near. Therefore be of sound mind, self-controlled, and sober in prayer. And above all things be earnest in your love among yourselves, for love covers a multitude of sins. Be hospitable to one another without grumbling. As each has received a gift, employ it in serving one another, as good managers of the grace of God in its various forms. If anyone speaks, let it be as it were the very words of God. If anyone serves, let it be as of the strength which God supplies, that in all things God may be glorified through Yeshua the Messiah, to whom belong the glory and the dominion forever and ever. Amen. 1 Peter 4:7-11