Sentence:  People who believe that a better life awaits us after this one would appear to have secured a <WSD>happier</WSD> ending, even before they come close to the end. There is little to be afraid of if you're armed with the promise of a wonderful future. Death is only a portal to greater joy. 
Meaning of the word marked with <WSD> tags:  Having a feeling arising from a consciousness of well-being or of enjoyment; enjoying good of any kind, such as comfort, peace, or tranquillity; blissful, contented, joyous.