The phrase "the saint that stole heaven" suggests someone who committed a virtuous act so remarkable that it defied expectations and surpassed what is typically considered achievable, even obtaining a reward as grand as heaven itself. It conveys the idea of exceptional goodness or heroism that transcends ordinary limits.
The patron saints of princesses are St. Adelaide and St. Dymphna.
It means that the Catholic Church has investigated her life and determined that she is a saint in heaven and worthy of honor, emulation and veneration.
The word saint can refer to any Christian; on earth, in heaven, or in purgatory. But it usually refers to a person that the Church knows for sure is in heaven (e.g. St. Francis of Assisi).
A saint becomes a saint the instant they enter heaven. However, before the Catholic Church can declare them as a saint in heaven they carry out a lengthy investigation to assure that the person is, indeed, in heaven. This is called the canonization process,
I believe you mean the Patron Saint of Hope, that is St. Jude, who is the saint for hopeless causes and desperation. Hope was martyred along with her sisters Faith and Charity sending her soul immediately to heaven. She is a saint but not a patron saint.
There is no specific saint known for waiting at the door of heaven. In Christian tradition, Saint Peter is often depicted as the gatekeeper of heaven, with the keys to the kingdom.
strolling saint peter (the song is about saint Peter, living in the heaven, is going out of the heaven in the night for amusement with an angel and to drink alcohol, German song from 1920)
St. Michael is an angel in Heaven, he is a saint.
Saint Peter is fine and enjoying his life in heaven.
The definition of saint in the Catholic Church is someone who is heaven. Thus to say that someone is a saint is to say that they are in heaven, so the answer to your question is yes, it is a tautology.
I do not understand your question. If Francis Xavier is a saint, that means he is dead and in Heaven. He is doing whatever saints do in Heaven.
We must assume that Saint Nicholas of Myra is currently in Heaven.