Give yourself to God and declare to Him that you desire to serve Him in the way most pleasing to Him (IV:37).
In order to raise a soul to the highest perfection God allows it to pass through dryness, brambles, and combats (IV:37).
You have already overcome the greatest difficulties, so you must take courage and hope that God will grant you the grace of overcoming the lesser ones (IV:21).
Perseverance is needed on the narrow path on which we have entered (IV:21).
Nature grows weary of austerity (IV:21).
We have to borrow money to feed ourselves and for the relief of the poor (IV:19).