Our whole life is a great mystery of God. All of life’s circumstances, no matter how insignificant they seem, have enormous meaning. We will understand the meaning of the present life in the future age. How circumspectly we need to regard it – but we leaf through our life, like a book, page after page, not being aware of what is written in it. There is nothing accidental in life; all is done according to the will of the Creator. May the Lord vouchsafe us in this life to acquire the right to enter into eternal life.
Elder Barsanuphius of Optina
(from his "Life")