Good News! Salvation is Free!

Good news! Salvation is free and without cost. All has been paid for on the cross. Look and be saved! Why is it that so many had refused so great a salvation that is free, all of grace? I cannot understand.

"Come, all you who are thirsty, come to the waters; and you who have no money, come, buy and eat! Come, buy wine and milk without money and without cost. (Isaiah 55:1 NIV)
He is the propitiation for our sins, and not for ours only but also for the sins of the whole world. (1 John 2:2 ESV)
And they said, "Believe in the Lord Jesus, and you will be saved, you and your household." (Acts 16:31 ESV)
If you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved. (Romans 10:9 NLT)
But everyone who calls on the name of the LORD will be saved, for some on Mount Zion in Jerusalem will escape, just as the LORD has said. These will be among the survivors whom the LORD has called. (Joel 2:32 NLT)
But everyone who calls on the name of the LORD will be saved.' (Acts 2:21 NLT)
For "Everyone who calls on the name of the LORD will be saved." (Romans 10:13 NLT)
Look unto me, and be ye saved, all the ends of the earth: for I am God, and there is none else. (Isaiah 45:22 KJV)
How shall we escape, if we neglect so great salvation; which at the first began to be spoken by the Lord, and was confirmed unto us by them that heard him; (Hebrews 2:3 KJV)