The existence of one angel proves the existence of the species of angels

The existence of angels is a kind of subject that when the existence of a single one is proved then the existence of its kind is accepted. Seeing a single angel is enough for accepting its kind because whoever denies must deny them all. A person who accepts one must accept of its kind, too.

Then in order to deny the existence of angels, it is necessary to deny the sources of pride of mankind, who are the prophets, saints and selected people and the others, and to deny their statements claiming that they met angels from the time of Hz. Adam (PBUH) up to now and to ignore their statements. This is not something possible to accept for a sane person. Since this is the truth, look! Do you not see and hear that from the time of Hz. Adam (PBUH) up to now, thousands of people whose place and time are different, declared that they met angels and what they said and informed about have been found consistent. Since a person’s meeting with a single angel is enough to prove the existence of all angels, how else can the agreement of thousands whose agreement on falsity is not possible on the same subject  be explained but by the existence of angels?