We are saved because God willed it (Heb 8:12) and made it possible and legal through the shed blood of Jesus Christ (Heb 10:10).      Salvation is totally an act of God's unmerited favor - Grace.     Our part is to have Faith in His Word - the Written Word and the Incarnate Word (Act 16:31).     

We have all been given The Measure Of Faith (Rom 12:3).      It is that gift of Faith than enables us to believe on the Lord Jesus Christ through whom we receive Grace (2Pe 1:3).     

Once we believe on the Lord Jesus Christ, the Faith Of Christ provides all the benefits of Grace (Rom 5:2).     

The Faith Of Christ is the foundation of Grace (Rom 5:19).      We are not supposed to trust in our Faith but, rather, trust in the Faith Of Christ (Phi 2:8-11).     

This is one of the most important verses in the book of Revelation for each of us personally.     

We overcome by two actions and one attitude.     The two actions;
1) Jesus shed blood
2) Our testimony.     

The one attitude is
1) Being willing to die for Christ's sake.

Jesus is saying that to willfully and verbally deny Him before men is the Unpardonable Sin.     
He states that our words against Him requires Him to speak against us to the Father.     If Jesus is not a person's advocate before the Father they are condemned to the Lake Of Fire Mat 12:32.     

Faithfulness is a characteristic of God.     If Faithfulness is not a part of our character we will deny Him eventually.     A person's denial of Him will require His denial of them.

God is good and anyone who aspires to be good must be filled with God the Holy Spirit.     He it is that manifests good in us.     Phi 2:13

Our hearts must be transformed by the power of the Word and the Holy Spirit.