It is reported on the authority of Abu Huraira that the Messenger of Allah (may peace and blessing be upon him) observed: Allah does not shower His blessings from the heaven that in the morning a group of men disbelieve it (to be a blessing from Allah). Allah sends down rain, but they (the disbelievers) say: Such and such star (is responsible for that).
The disbelievers in this hadith are those who do not believe in God or His power to provide these blessings. They think they can explain away these miracles with science or superstition, but they are wrong because only God has control over such things. We must remember this lesson and always give thanks to Him for all He provides us with each day.