Little Russian Philokalia: St. Seraphim of Sarov
All the enjoyments of this world are not even a shadow of  that which is prepared in the heavenly abodes for those who love God;  there, is eternal joy and triumph.My joy, I beg you, acquire the Spirit of Peace. That means to bring  oneself to such a state that our spirit will not be disturbed by  anything. For one must go through many sorrows to enter the Kingdom of  Heaven. This is the way all righteous men were saved and inherited the  Heavenly Kingdom.We have become so inattentive to the work of salvation that we  misinterpret many other words in Holy Scripture as well, all because  we do not seek the grace of God and in the pride of our minds do not  allow it to dwell in our souls.