Grace is unconditionally open to all, and salvation by grace is conditioned on repentance from dead works:
The first condition of God for salvation by grace has always been that of repentance:
Repent ye therefore, and be converted, that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord; And he shall send Jesus Christ, which before was preached unto you. (Acts 3)
No repent ye, no be converted, no being saved. Without repentance, there is no salvation. And so, salvation is conditioned on repentance.
To say salvation is unconditional is to say there is no condition that comes with salvation, which may be idolized by man, but is not of God. No one thinks for any second that salvation comes without the condition of repentance. People only try to invent such, when they find themselves not keeping that first condition of salvation: "Well, gosh, I'm not repenting of what I know to repent of, but at least I'm still saved!"
God's grace is unconditionally open to all: no respect of persons and no time limit but open eternally by the blood of the Lamb, that is incorruptible and everlasting as is His gospel of the cross (Rev 14), and God's salvation by grace comes with the first condition of repentance from dead works, which is the first principle of the doctrine of Christ, which is written even before having faith toward God. (Heb 6:1)
Grace is unconditionally open to all, salvation by God is conditional to all: with condition of repentance, which is first of the things that accompany salvation, without which there is no salvation by God:
Repentance and salvation are one, even as the Father and the Son are one: salvation accompanies repentance, even as repentance accompanies salvation. Without the shedding of blood of the Lamb, there is no remission of sins by grace, and without repentance of sins, there is no washing in the blood: no salvation of God the Father by His Son. God will save no man without repentance and belief in His Son.
Repent ye: for the kingdom of heaven is at hand. The thing about the salvation of God, is that repentance and salvation always accompany one another, even as the Father and the Son.
Unless,
1. There is salvation without repentance.
2. Repentance is not necessary for salvation by grace.
3. Conversion does not come by necessary repentance.
4. Being converted is not salvation, but only after salvation.
5. We can be washed in the blood, without repenting of the sins that crucified the Lamb of God.
Faith without works is dead, and faith without repentance was never alive in the first place, since repentance is the first condition of salvation.