Most of the English translation of the New Testament contain words such as "holy," "sanctify," "holiness" and "sanctification" in reference to the God, Jesus Christ and the Spirit of the God, and also referrring to those called out and sent out by the God. The translated word "holy" is often to describe temple and places where the presence of the God and also His dwelling place. There are hardly any writing detailing the meaning and significance of "holy," "sanctify," "holiness," "sanctification" by "Christian authors" according to the New Testament scriptures. Words such as "holy" and "holiness" are used in the world especially by people of other religions describing places and people such as the Dalai Lama and the pope, the head of the Catholic Church. Do those who confess to be believers into the Lord Jesus Christ understand the meaning of "holy," "sanctify," "holiness" and "sanctification" as translated in most English Bibles? We often hear of the saying, "We are sinners saved by the grace of the God" by so-called Christians. This statement is not the truth. The truth is that sinners are saved by the grace of the God, who then makes sinners to become holy ones in order that they may be saved. That is why in the New Testament scriptures the apostles often described believers as "holy ones" or "saints" because unless those called by the God to salvation become holy they will not enter into the kingdom of the God or will not receive everlasting life. It is therefore important that those who are called out by the God to salvation must not only understand the meaning of "holy," "sanctify," "holiness" and "sanctification," they must also ultimately become holy before the God in order that they may inherit everlasting life. To many professing believers today the words "holy" and "holiness" are rather nebulous or vague to them. They mostly link holy and holiness to the God, Jesus Christ, the angels and the prophets of the God. And if the believers are called holy ones, they understand that they are cleansed by the blood of Jesus Christ, even though they still live and walk according to their own thinking of what is good. This Book Number 21 is released to reveal the true meaning of five Greek words relating to holy, sanctify, holiness and sanctificatioin, and how they are linked to the salvation of those the God called/calls to salvation. Since all mankind ar born sinners, how are those mankind who are called to salvation made holy or become holy? The five Greek words appearing in the New Testament scriptures revealed in this book are "hagios," "hagiazo," "hagiasmos," "hagiosune" and "hosiotes." Their meaning and significance to the gospel of salvation are also revealed according to the contexts in its appearance in each scripture. The relationship between holy and righteous is also revealed according to the New Testament scriptures. Believers are told to pursue to holiness without which they will not see the Lord (Hebrews 12:14) and Peter told believers that they must be holy in all behaviour and that believers must become holy because the God is holy(1 Peter 1:15-16). This book reveals the essentials according to the New Testament scriptures the meaning of holy, holiness and how to become holy in order for believers to be blameless before the God to receive everlasting life.