Children are happy because they don't yet have a file in their minds called "All the Things That Could Go Wrong. " They don't have a mind-set that puts "Things to Fear" before "Things to Love. " Unless we can be like little children, we can't enter into the kingdom of heaven; unless we can be like little children, we can't be happy. Children are happy because they don't have all the facts yet.
Life is a great and noble calling, not a mean and grovelling thing to be shuffled through as best as we can but a lofty and exalted destiny.