'Unless' in the Bible

For I assure you that unless your righteousness greatly surpasses that of the Scribes and the Pharisees, you will certainly not find entrance into the Kingdom of the Heavens.

Again, how can any one enter the house of a strong man and carry off his goods, unless first of all he masters and secures the strong man: then he will ransack his house.

said, "In solemn truth I tell you that unless you turn and become like little children, you will in no case be admitted into the Kingdom of the Heavens.