God has planted eternity in men’s hearts and minds, a divinely implanted sense of a purpose working through the ages which nothing under the sun but God alone can satisfy. Ecclesiastes 3:11 (AMPC, Paraphrased)
When all has been said and done, the Christian Mission Statement is to know God* and to make Him known.
*To know Him is not simply to gain more and more knowledge about Him, but to share an intimate communion with Him. To have fellowship with Him in the style of Moses. Sometimes the footnote is the most important part.