When God Gave Christ to Our World, He Held Back Nothing
When God gave Christ to our world, He gave in this one gift all the treasures of heaven. He held back nothing. He can do no more than He has done to bring men to repentance. He has no means held in reserve for their salvation.
- Ellen White, Calamities and God's Love; Sin, Judgment, and the Shortness of Time
As far as salvation goes, this is it. No further offers will be made.
All we need to do is believe in Jesus, and that He died for our sins. Is that really too much to ask?