Prayer is a very useful healing treatment that if we not use as we should and we don’t apply it on the wound properly as a doctor would, it will not heal our infirmity. Perseverance in the prayer in truth and spirit is very useful and has a great power. If we prayed and God listened, we should be grateful to Him.

If our will didn’t come true, let’s pray again, third, fourth, tenth, twentieth, thirtieth, fortieth time, until God will listen and fulfill our request. Christians let not entrust themselves that others are praying form them; but they themselves should persevere in prayers in order to receive what they are asking, those that are profitable to them.

(Protosinghel Nicodim Măndiță, Învățături despre rugăciune, Editura Agapis, București, 2008, p. 60)