Sometimes we do not persevere (continue) in prayer long enough. Paul himself had "at first" preached while being ill (Galatians 4:13-14) and was later healed.
Kung minsan hindi tayo nagtitiyaga (nagpapatuloy) sa pananalangin. Nang una si Pablo ay nangangaral habang siya ay may sakit (Galacia 4:13-14) at di nagtagal siya ay gumaling.