Standing in God’s temple, picture to yourself that you are in heaven itself, that you stand before God with the higher powers and do with them everything that they do. In picturing this to yourself, make a rule for yourself that under no circumstances will you leave church before the end of the service.
If you stand thus perfectly in order as said above, and from this standing you become very tired, or you become exhausted from some bodily illness or old age, then sit wherever there is a place in church, in order not to tempt your brother.
Examine yourself, whether it be not despondency or laziness that make you tired, whether it be not distraction of mind and bodily passions that make you lose your strength and manly courage. Reflecting thus, accuse yourself of impatience, of infirmity, of weakness, of laziness, and again be ashamed before God and His angels and men, and reflect in your conscience that he that shall endure unto the end, the same shall be saved (Mk. 13:13).
If while standing in prayer you become completely unable to endure some natural necessity, or if some great affliction strikes you, accuse yourself likewise, just as written above. …
And if you will thus reflect and accuse your own soul, and if you endure unto the end, you shall proceed from strength to strength and shall receive invisibly from God health of body and enlightenment of soul.