Beings either vibrate higher and faster or lower and slower. There is no in between. For that reason it is vital to support and maintain a higher vibration. Furthermore, it is crucial to avoid engaging in even one negative quality because that increases the risk that more will follow. Buddhist teaching offers a story of the "hopeless" monks which supports this viewpoint.
One morning while on his routine begging rounds, a beautiful woman who was the wife of a wealthy man known to be a generous donor to Buddhist causes, invited him into her home. He entered expecting she would place food into his begging bowl. Instead, she engaged him in conversation. When the monk realized he'd spent too much time alone with a woman, he excused himself and went to the door only to find it was locked.
"Please," he asked the woman, "would you open the door."
The woman shocked him when she said: "Not just yet. I will only let you out of the room if you do one of the following: kill the goat tied up in the back yard or drink this jug of wine or have sex with me." Obviously she was testing the monk's commitment to his vows which included not killing, not eating meat, not consuming alcohol and not engaging in sexual misconduct.
Thinking quickly how he could extract himself out of this dreadful situation, he concluded that the least offensive action he could take would be to drink the wine. That would harm no one but himself. So he did. Unaccustomed to liquor he became quite drunk. Inebriated, his will was weakened and he became hungry so he killed the goat. While he was waiting for it to be cooked, he then had sex with the woman.
His downward spiral began with one negative action which led to many more.