The spirit may be strong, yet the flesh has its infirmities.
In one's daily diet when serious medications are already a necessary part of it, that's when one comes to terms with reality and comes to realize more the value and sacredness of life. Serious suffering has the potential to grow the soul into a deeper union with God such that every painful groaning becomes a prayer and every catching of breath is a thanksgiving.
But despite sufferings, God's grace is so amazing; it's far more than enough to sustain a suffering soul.
What's sustaining your weary soul?
But if we hope for that we see not, then do we with patience wait for it? Likewise the Spirit helps us in our weakness. For we do not know what to pray for as we ought, but the Spirit himself intercedes for us with groanings too deep for words. And he that searches the hearts knows what is the mind of the Spirit, because he makes intercession for the saints according to the will of God. (Romans 8:25-27)
"My grace is sufficient for you, for my power is made perfect in weakness." (2 Cor. 12:9)