God sent His Son to pay for our pardon.
To ‘believe’ is more than intellectual assent that Jesus is LORD. “You believe that there is one God. You do well. Even the demons believe—and tremble!” James 2:19
Believe means to put our trust, confidence and conviction in Christ Jesus that He alone can save us. Believing is both trusting His words as reliable and relying on Him for the power to change.
This life on earth is just the introduction to eternity. Receive this eternal life by faith in Christ.